Pattern of pediatric ocular trauma in India

OBJECTIVE: The aim of the study is to identify the causes, demographic and clinical profile and evaluate final visual outcome of pediatric ocular injuries. METHODS: Two hundred and four children aged fourteen years or less presenting to the emergency services of a tertiary care centre with ocular injury were included. Demographic data, nature and cause of injury, duration between injury and presentation to an ophthalmologist and the diagnosis were recorded. Evaluation of visual acuity, anterior segment and fundus were done. All patients were appropriately managed and followed up on days 1, 7, 1 month, 3 and 6 months. RESULT: Majority of injuries occurred in children of 5 years and older (87.7%). There were 133 (65.1%) boys and 71 (34.9%) girls. Forty-nine (24%) cases presented within 6 hours of injury while 70 (34.3%) presented after more than 24 hours after trauma. Most common cause of injury was bow and arrow (15.2%) followed by household appliances(14.3%). Closed globe injuries accounted for 42.2% injuries, open globe for 53.9% and 3.9% were chemical injuries. Best corrected visual acuity of 6/12 or better was achieved in 79 eyes (91.86%) in closed globe group. However, only 17 eyes (15.45%) in open globe group could achieve this. CONCLUSION: Most ocular injuries in children are preventable and occur from unsupervised games like bow and arrow and firecracker, which can lead to significant visual loss.     

Traumatismo ocular en Urgencias de Pediatría,características y factores de riesgo de secuelas inmediatas

ObjectiveThis study assesses the clinical characteristics and epidemiology of children with eye trauma presenting to the Emergency Department in Spain and analyze the risk factors associated with immediate sequelae.MethodsA multicentric prospective case series study conducted during 24 months of patients presenting to the Pediatric Emergency Departments in five hospitals collaborating with the Spanish Pediatric Emergency Research Group. Data were collected from October 2016 through September 2018, including all patients up to the age of 16 years old presenting to the Emergency Department with an ocular trauma. All injuries were classified by Birmingham Eye Trauma Terminology.ResultsA total of 242,134 visits to the Emergency Departments took place during the study period, being 1,007 ocular traumas (0.42%; IC 95% 0.40-0.45) and 858 were included in the study. Most commonly, injuries occurred while playing (54.7%), except in the 15 or more-age group, in which sports activities were more common (23.1%). The place of the trauma varied depending on the age group, being home (34.7%) and schools or sports areas (34.3%) the most recurrent. Blunt objects were the most frequent mechanism of trauma (48.6%). Most of the injuries were classified as closed globe (85.5%), mainly contusions (52.7%). Fifty-eight patients (6.8%) presented with immediate sequelae, being the impairment of visual acuity the most common (70.7%). The risk factors associated with immediate sequelae were the 10 or more-age group, the preexisting refractive errors, the open globe injuries and the injuries with blunt objects.ConclusionsOcular trauma is a frequent chief complaint in the Pediatric Emergency Departments in Spain. Increasing awareness of the serious nature of ocular injuries and the study of the risk factors will help to develop a comprehensive plan for educating both parents and children to minimize preventable eye injuries sequelae.     

Open globe injuries in children: a retrospective analysis

PURPOSE: To study the outcome of open globe injuries in patients aged <14 years and compare the results between patients who presented approximately 30 years ago and a recent series. METHODS: Between January 1970 and January 1993, 180 eyes of children who presented with an open globe injury were retrospectively analyzed. Patients were divided into two groups. One group of children underwent treatment of an open globe injury between January 1970 and December 1981 (group A) and another between December 1985 and January 1993 (group B). Main outcome measures studied were final visual acuity and enucleation rates. Risk factors studied included age, race, sex, visual acuity, type of trauma, and various injury characteristics at presentation. RESULTS: The factors associated with visual outcomes included: age, type of injury, wound size, initial visual acuity, and retinal detachment. Final visual outcome and enucleation rates were not significantly different between the older series (group A) and the recent series (group B). Lenticular damage, location, posterior extent of the injury, and presence of an intraocular foreign body had been significant prognostic factors in the older series, but were not statistically associated with the prognosis in the recent series. CONCLUSION: The nature of the injury and the patient's age are the main determining factors in the outcome of open globe injuries in children.     

Pediatric ocular trauma: Characteristics and outcomes among a French cohort (2007–2016)

Pediatric ocular trauma is a major cause of acquired monocular blindness. Post-traumatic visual impairment can lead to significant handicap. In France, recent data on the epidemiology of pediatric ocular trauma are lacking.AimTo describe the characteristics of a pediatric cohort with ocular trauma and to analyse patient outcomes.Material and methodsThis was a retrospective observational study of pediatric ocular trauma (age < 15 years) presenting to pediatric and ophthalmology emergency units of our tertiary university hospital between January 1, 2007 and December 31, 2016. Data were collected on: age, sex, time and circumstances of trauma, injury type and location, trauma mechanism, other associated injuries, hospitalisation rate and length of stay, treatment, and sequelae (visual impairment). Ocular traumas were classified according to the Birmingham Eye Trauma Terminology (BETT) system and the Ocular Trauma Score (OTS).ResultsA total of 337 children were included (247 males). The global mean age was 8.4 ± 4.1 years (range 6 months to 14.9 years). The trauma occurred at home (51%) or in a public area (21%). Blunt objects (22%) and direct trauma (17%) were the main mechanisms. According to the BETT, 23% of ocular traumas were open-globe traumas (OGT): penetrating (n = 39), perforating (n = 12), with intraocular foreign body (n = 24). Among closed-globe injuries (CGT), hyphema was the most frequent lesion (22%). Associated injuries were recorded in 32 patients. In all, 63% of patients had an OTS of 5 (good visual prognosis) while 39 children (12%) had an OTS of ≤ 3. In 47 patients, there was an initial surgery; 62% of children were hospitalised. By the end of the ophthalmic follow-up, 32 patients (9.5%) had sequelae. Children aged between 2 and 5 years had the greatest proportion of sequelae (15%). Compared with female patients, male patients were older (P = 0.0007) and were more frequently injured by projectiles (P = 0.036). Compared with CGT, OGT were more frequent among younger children (P = 0.0015). Ocular injuries secondary to a projectile and spring-summer accidents were associated more frequently with a poor visual prognosis (OTS ≤ 3; P = 0.036, OR = 2.5 [1.1–5.8] and P < 0.0001, OR = 5.8 [3.2–10.7] respectively).CommentsThe annual admission for pediatric ocular trauma was stable during the study period (200 cases per 100,000 annual trauma admissions in the first period [2007–2011] and 195 cases per 100,000 during the most recent period [2012–2016]). Projectiles such as Airsoft gun bullets and paintball are still the cause of severe injuries while reports on ocular injuries secondary to blaster or Nerf guns use are starting to be published.ConclusionThe great majority of ocular traumas could be prevented, especially by wearing protective goggles during at-risk activities. French legislation should be stricter about the sale of any Airsoft gun to children under 18 years old. Parents must repeat educational warnings to their children handling sharp objects. The social and psychological burden of relative visual impairment is of importance: One in ten children will have a permanent visual defect.     

Mechanical eye (globe) injuries in children

PURPOSE: The epidemiology of mechanical eye injuries in children was studied to identify the agents of injury and their contribution to the severity of visual loss and to suggest preventive measures. METHODS: The mode, type, and severity of injury were correlated with the visual acuity 6 months after the injury in all children with mechanical eye injuries between January 1994 to January 1999. RESULTS: Of the 68 children with mechanical eye injuries, the mode of injury was host (child) related in 12 (17.65%) patients, agent related in 40 (58.82%) patients, and environment related in 16 (23.53%) patients. Mild injuries were seen in 22 (32.35%) patients, 31 (45.59%) patients had moderate injuries, and 15 (22.06%) patients had severe injuries. None of the patients with host-related injuries had a severe injury. Six (66.67%) patients with host-related injuries had a good visual outcome and none had a poor outcome. Among patients with agent-related injuries, 11 (25%) had a good outcome, 14 (40%) patients had a fair outcome, and 10 (22.5%) patients had a poor outcome. Of the patients with environment-related injuries 3 (33.33%) each had good, fair, and poor visual outcomes. CONCLUSIONS: Agent and environment-related injuries had a far worse outcome than host-related injuries. This epidemiological classification directly suggests practical preventive measures that can be adopted at home or at school to reduce the incidence and severity of ocular injuries. The other predictors of the final visual outcome were the severity of the injury at presentation and the necessity for a secondary surgical procedure.     

Complications of ocular paintball injuries in children

PURPOSE: To evaluate the ocular complications of paintball injuries in children. METHODS: The clinical course of four children with traumatic ocular paintball injuries was evaluated. All patients underwent a complete ocular examination. Their age, injuries sustained, surgical procedure(s) performed, presence of protective eyewear at the time of injury, and final visual outcome was assessed. The presence of directly related anterior and posterior segment abnormalities were also evaluated. RESULTS: Four boys sustained traumatic paintball injuries. Average patient age was 11.25 years (range: 10-12 years). None of the children were wearing ocular or facial protection at the time of the initial injury. All patients had hyphema and traumatic cataract, and some form of retinal pathology (vitreous hemorrhage, epiretinal membrane, retinal hemorrhage, and choroidal rupture). One child had a partial-thickness corneal laceration that did not require surgical intervention. All other patients underwent ophthalmic surgery. Final visual acuity was 20/30 or better in two patients, and 20/100 or worse in the others. The cause of decreased visual acuity in these children was directly related to macular pathology. CONCLUSION: Ocular injuries resulting from paintball impact are often severe and usually occur when the participants are not wearing eye protection or this protection becomes dislodged. Treatment of these injuries is sometimes limited to an attempt to salvage what remains of useful vision. Unfortunately, most of these sports-related injuries could have been prevented if patients wore adequate eye protection when involved in this sport.     

Foveal photoreceptors loss and then recovery after treatment in a chronic myelogenous leukemia patient

Abstract

We report a 10-year-old boy with chronic myelogenous leukemia (CML)-related retinopathy of the eyes. Foveal photoreceptors loss was noted in the right eye, but it was restored with a continued ellipsoid zone after systemic 6-week imatinib mesylate and hydroxyurea treatment. Spectral-domain optical coherence tomography images of the foveal photoreceptors change in the right eye were taken. His best-corrected visual acuity of the right eye recovered from 20/100 to 20/20. Prompt treatment of the underlying CML could result in improvement or resolution of the ocular findings, and even foveal photoreceptors loss might be reversible with good visual acuity recovery.     

Isolated and multisystem hepatic trauma in children: the true role of non-operative management

 We retrospectively reviewed children with hepatic injuries (HI) admitted to our institutions from January 1982 to December 1999. Specific comparison was made of isolated (IHT) and multisystem hepatic trauma (MHT). Over the 18-year period 127 patients were identified with HI, 91 (71%) with MHT and 36 with IHT. The median age was 8 years (range 13 months to 14 years). Motor vehicle injury was the most common mechanism in both groups, but bicycle injuries were more common in IHT (P<0.001). Shock (P=0.02), the requirement for blood transfusion (P<0.001), and operative intervention for the HI (P=0.001) were all significantly more common in MHT. The distribution of liver injury grades was similar between the two groups. Twenty-two (17.3%) children died and in 18 the HI was the main cause or contributed significantly. There were 19 and 3 deaths in the MHT and IHT groups, respectively, a difference that was not significant. After excluding children with minor HI, 27 (39%) required operative intervention within 24 h of their injury. This suggests that the high success rate for non-operative management of HIs in the literature may have been biased by the inclusion of a significant proportion of subclinical injuries. Accepted: 7 February 2001     

Self-inflicted ocular mutilation in the pediatric age group

Three mentally retarded children with severe self-inflicted ocular injuries are presented. All three suffered from severe ocular injuries including retinal detachment resulting in progressive visual loss and even blindness. Self-inflicted injuries to the eyes, including self enucleation, is an extremely uncommon form of behavior, rarely encountered by pediatricians. The risk of ocular morbidity is high if the diagnosis is overlooked. Technical advances in ophthalmology permit much improvement in some formerly hopeless cases of ocular self-mutilation, but there is still no accurate method to repair destroyed retinal or nervous tissue. Early identification of patients at risk of ocular self-mutilation is essential in order to prevent or minimize such severe ocular injuries.     

Visual acuity and stereopsis between the ages of 5 and 10 years

The development of visual acuity and stereopsis was studied in 321 boys and 340 girls aged between 5 and 10 years. Visual acuity was assessed by the E test and a modified version of the STYCAR test, stereo acuity by the Lang-Stereo test [17]. Both vision tests showed an increase in the median visual acuity between the ages of 5 and 10 years. The E test indicated an increase from 1.2 between 5 and 6 years to 1.5–1.7 between 7 and 10 years. The values obtained with the STYCAR test were 0.6–1.3 higher, depending on the test rating used. Visual acuity norms between 5 and 10 years are presented as empirical centile curves. No significant differences were observed in visual acuity between the left and right eyes, nor between the sexes. The right eye was found to be the leading eye in 54.8% of the boys and 54.5% of the girls (P<0.001). The Lang-Stereo test was passed by 87.9%–94.3% of all children, and there were no significant differences with respect to age and sex. Children who failed the test had a significantly lower visual acuity than those who passed it. In the former group a significant interocular difference in visual acuity was present (P<0.01). This work was supported by the Swiss National Science Foundation No. 3988.-1.84     

Eye injuries among children in Kuwait: pattern and outcome

One hundred and ninety four children with ocular injuries were admitted to the Eye Department at Ibn Sina Hospital, Kuwait during a 1-year period (1983). They represented 8.7% of total admissions and 56% of all ocular injuries admitted in the same period. These figures are higher than any previously reported figures in comparable series. The risk of severe ocular injury to children was found to be 0.35% per 1000 per year. There were 47 (24%) perforating injuries and 111 (57%) concussion injuries. Catapulted missiles were the commonest cause of injury (26%). Early presentation to hospital accounted for a low rate of secondary infection. Visual outcome of 6/12 or better was achieved in 78.5% of concussion injuries and 27.3% of perforating injuries. Education in organized school programmes has been recommended to reduce the incidence of ocular injuries in children.     

Intraocular lens implantation in children and youth.

PURPOSE: To evaluate the safety and the effectiveness posterior chamber intraocular lenses (PCIOLs) in children and youth with cataract. METHODS: Retrospective study of operative and postoperative results was based on 146 eyes in 125 children ages 6 to 18 years (mean: 11.7 years) who underwent extracapsular cataract extraction with IOL implantation in the period from 1986 to 1996. Follow up was 1 to 10 years. OUTCOME MEASURE: Best corrected distance and near visual acuity, operative complications, and early and late postoperative complications. Exclusion criteria were uveitis, retinal detachment, prior glaucoma, and systemic diseases. RESULTS: Early postoperative complications were observed in 12.3% of cases including iritis in 7.5%, and transient corneal edema in 3.4% of eyes. Posterior capsule opacification requiring capsulotomy was needed in 81.5% of eyes after 8.5 years. YAG laser capsulotomy was performed in 68.1% and surgical intervention in 26.8% of cases. In 5.1% of the cases, both techniques were used. In 74.7% of patients, best corrected visual acuity of 0.5 or better was achieved. The mean postoperative spherical equivalent was +0.35 diopters (D, SD 1.35). Spectacle-corrected near visual acuity of 0.5 on the Snellen chart was obtained in 82.8% of eyes. CONCLUSION: IOL implantation in children older than 6 years appears to be an efficacious, satisfactory, and safe procedure in the management of pediatric cataract.     

Injuries Among Children With Autism Spectrum Disorder

ObjectiveWe compared risk of injury among children with autism spectrum disorder (ASD) to those without ASD, adjusting for demographic and clinical characteristics.MethodsWe used claims data from 2001 to 2009 from a commercial health plan in the United States. A validated ASD case identification algorithm identified 33,565 children (ages 0–20 years) with ASD and 138,876 children without. Counting process models tested the association between ASD status and injury episodes with separate regressions run for children during different age periods.ResultsUnadjusted results demonstrated that children with ASD had a 12% greater injury risk than children without ASD (hazard ratio [HR] = 1.119; P < .001). After including demographic variables, the HR was 1.03 (P < .05); after controlling for co-occurring conditions, such as seizures, depression, etc, HR decreased to 0.889 (P < .001). For the age period analysis, HR values were as follows: for 0 to 2 years, HR 1.141; 3 to 5 years, HR 1.282; 6 to 10 years, HR not significant; and 11 to 20 years, HR 0.634 (P < .05 for all significant results).ConclusionsChildren with ASD have more injuries than children without ASD. After controlling for demographic factors and co-occurring conditions, children with ASD are at lower risk of injury, suggesting that co-occurring conditions or the ways these conditions interact with ASD is related to injuries. Clinicians should understand that injury risk in children with ASD may be driven by co-occurring conditions. Treating these conditions could thus decrease injury risk as well as have other benefits. Injury prevention interventions are especially warranted for younger children with ASD and those with seizures, depression, visual impairment, or attention-deficit disorders.     

Use of Irradiation for Therapy of Retinoblastoma in Children More Than 1 Year Old: The St. Jude Children's Research Hospital Experience and Review of Literature

Fifteen children (>1 year old at diagnosis) were treated for retinoblastoma (RB) with primary irradiation at St. Jude Children's Research Hospital between January 1963 and January 1992. Staging of the 19 treated eyes was as follows: Reese-Ellsworth (R-E) Groups I and II, n = 7; Group III, n = 3; Group IV, n = 1; Group V, n = 7; information on one globe is incomplete. Total dosage ranged from 25 to 45 Gy (median = 40 Gy) in fractions of 170–225 cGy delivered 5x/week (n = 13) or 225–265 cGy delivered 4x/week (n = 4 eyes) or x5/week (n = 2 eyes). Treatment techniques included anterior field (n = 11) or lens-sparing technique (n = 8). One patient has died of progressive central nervous system (CNS) disease at 13 months; one patient succumbed to second malignant neoplasm within the irradiated field at 194 months; the remaining 13 patients remain alive from 27 to 301 months (median = 178 months). Local control with irradiation alone has been maintained in 12 eyes. Four eyes with local recurrence were salvaged using cryotherapy or reirradiation. Enucleation was required for three eyes for progressive disease at 4, 7, and 7 months postirradiation. Cataract formation was documented in nine eyes treated with anterior fields and in one patient treated with lens-sparing technique. At last follow-up, 7 patients had visual acuity of 20/100 or better. Radiation dose of 40 Gy appears to be adequate for local control of early stage RB (R-E Groups I-III and VB whose tumors are R-E Groups I-III) in patients >1 year old. The results of this limited series which has lengthy follow-up is compared with the results of previously published data in an effort to define the benefits and disadvantages of the different treatment techniques which have been reported in the treatment of RB in children >1 year old. © 1995 Wi1ey-Liss, Inc.     

Ocular injuries in children after major trauma

OBJECTIVE: To determine the variety of ocular injuries sustained by children during major trauma. SUBJECTS AND METHODS: The pediatric trauma registry of The Children's Hospital in Denver, Colorado, was surveyed for children with ocular injuries and an Injury Severity Score higher than 15. The injuries were tabulated and correlated with mechanisms of injury to determine identifiable injury patterns. RESULTS: In a pediatric trauma center, ocular injuries were nearly twice as frequent among children with major trauma (Injury Severity Score > 15). Two-thirds of the children with an Injury Severity Score higher than 15 had been involved in a mishap with a motorized or a nonmotorized vehicle. Ocular injuries in children with an Injury Severity Score higher than 15 were characterized by fracture of the surrounding bony structures and contusions. Children with an Injury Severity Score higher than 15 had 50% to 80% fewer open wounds of the ocular adnexa and eyeball than did children with an Injury Severity Score of 15 or lower. The one optic nerve injury and two-thirds of the other ocular cranial nerve injuries occurred in children with an Injury Severity Score higher than 15. CONCLUSIONS: Serious ocular injury should be suspected in children involved in a motor vehicle accident who have an Injury Severity Score higher than 15 and fractures of the surrounding bony structures, contusions, or both. Absence of an open wound of the ocular adnexa or eyeball does not eliminate the possibility of serious ocular injury.     

Baby Gate–Related Injuries Among Children in the United States, 1990–2010

ObjectiveBaby gates are one of the most widely used home safety products to protect children from home hazards. The objective was to describe the epidemiology of baby gate and barrier-associated injuries among children. It was hypothesized that injuries experienced by children ages ≤2 years and those >2 years were significantly different as a result of differences in gate interactions.MethodsA retrospective analysis was conducted by using nationally representative data from the National Electronic Injury Surveillance System. A total of 1188 actual cases were reviewed and national estimates generated.ResultsAn estimated 37,673 children were treated in emergency departments for injuries associated with gates, yielding an average of 1794 cases annually. The incidence of gate-related injuries increased significantly from 3.9 per 100,000 children in 1990 to 12.5 per 100,000 children in 2010 (P < .001). Patients were primarily boys (61.0%) and were <2 years of age (60.4%). Patients <2 years of age were most often injured by falls down stairs (odds ratio 6.72; 95% confidence interval 6.32–7.16) after the collapse of the gate. Patients aged 2 to 6 were most often injured by contact with the gate (odds ratio 2.03; 95% confidence interval 1.95–2.12), resulting in open wounds (55.4%) and soft-tissue injuries (24.2%).ConclusionsGiven the clear dichotomy between injury characteristics of patients aged <2 years and patients aged 2 to 6 years of age, as well as the prevalence of preventable injuries, greater efforts are needed to promote proper usage, ensure safety in product design, and increase awareness of age-related recommendations for use of gates.     

Pediatric silicone oil surgery

PURPOSE: To evaluate clinical characteristics, surgical aspects, and visual outcomes of pediatric patients who underwent pars plana vitrectomy and silicone oil injection for complicated retinal detachment. PATIENTS AND METHODS: The records of 24 patients (25 eyes) younger than 18 years were retrospectively reviewed. All patients underwent pars plana vitrectomy and silicone oil injection for complicated retinal detachment between January 1995 and June 2004 in the Ophthalmology Department of Dokuz Eylul University, Izmir, Turkey. All patients had follow-up at or beyond 6 months. RESULTS: Nineteen (79.2%) boys and 5 (20.8%) girls were included. Mean age was 12.6 years (standard deviation, +/- 3.5; range, 5 to 17). Five eyes (20%) had blunt ocular trauma. Eleven eyes (44%) had penetrating trauma. Three eyes (12%) had high myopia. Four eyes (16%) had congenital cataract surgery. One eye (4%) had redetachment 1 month after vitreoretinal surgery performed at another clinic. One case had bilateral proliferative vitreoretinopathy with an undefined cause. The retina remained attached in 18 (72%) of 25 eyes at the final examination (17 were totally attached; 1 was partially attached). Mean follow-up was 23.4 months (standard deviation, +/- 20.5; range, 6 to 108). Postoperative visual acuity improved to 1/10 or better only in 6 eyes (24%) at the last examination. CONCLUSION: In pediatric patients with complicated retinal detachment, silicone oil injection for intraocular tamponade is an option for treatment, but visual outcome is poorer than for adults.     

Use and Utility of Skeletal Surveys to Evaluate for Occult Fractures in Young Injured Children

ObjectiveTo describe the percentage and characteristics of children aged <24 months with non-motor vehicle crash (MVC)-related injuries who undergo a skeletal survey and have occult fractures.MethodsWe performed a retrospective chart review of a stratified, systematic random sample of 1769 children aged<24 months with non-MVC–related bruises, burns, fractures, abdominal injuries, and head injuries at 4 children's hospitals between 2008 and 2012. Sampling weights were assigned to each child to allow for representative hospital-level population estimates. Logistic regression models were used to test for associations between patient characteristics with outcomes of skeletal survey completion and occult fracture identification.ResultsSkeletal surveys were performed in 46.3% of children aged 0 to 5 months, in 21.1% of those aged 6 to 11 months, in 8.0% of those aged 12 to 17 months, and in 6.2% of those aged 18 to 24 months. Skeletal surveys were performed most frequently in children with traumatic brain injuries (64.7%) and rib fractures (100%) and least frequently in those with burns (2.1%) and minor head injuries (4.4%). In adjusted analyses, older age, private insurance, and reported history of accidental trauma were associated with decreased skeletal survey use (P ≤ .001 for all). The prevalence of occult fractures on skeletal surveys ranged from 24.6% in children aged 0 to 5months to 3.6% in those aged 18 to 24 months, and varied within age categories based on the presenting injury (P < .001).ConclusionsThe high rate of occult fractures in infants aged 0 to 5 months underscores the importance of increasing the use of skeletal surveys in this population. Further research is needed to identify the injury characteristics of older infants and toddlers most at risk for occult fractures.     

Screening for visual and ocular disorders in children, evaluation of the system in Sweden

The aim of this study was to evaluate the visual screening system in Sweden. We have made a retrospective investigation of the results of screening for ocular disease and visual impairment of all children born in 1982 in three Swedish communities. The records from screening examinations from 0 to 10 y and from diagnostic follow-up at the departments of ophthalmology that the children were referred to were inspected. The data were used to evaluate the efficiency of the Swedish visual screening system. The study included 3126 children. The attendance rate at the 4-y examination was better than 99%. The sensitivity of the 4- and 5.5-y screening examinations was on the average 92% and the specificity was 97%. The average number of false negative cases at 4 y was 5.6 in 1000 (0.56%). With this screening and subsequent diagnosis and treatment, the prevalence of amblyopia at different levels of visual acuity at the age of 10 y was: 0.06% with visual acuity <0.1,0.9% with visual acuity <0.5 and 1.7% with visual acuity < 0.7. In spite of largely unchanged pressure of amblyogenic factors in the population, the prevalence of deep and moderate amblyopia has been markedly reduced by screening and early treatment.     

Population-based incidence of injuries among preschoolers

Abstract A population survey was conducted to determine the incidence of injuries among preschoolers and their risk factors. A systematic sample (15%,n-4540) of families with at least one child aged 0–5 years in 1991 living in the Canton of Vaud (Switzerland) received a mailed questionnaire in February 1992. There were 5827 eligible children in the sample. The response rate was 67.5% after two recall mailings. Injuries were defined as those from all causes with at least one physician contact in 1991. The overall incidence was 224 injuries per 1000 children (95% CI [=confidence intervall]: 211–237); 188 per 1000 children were injured over 1 year (95% CI: 176–200,n-746), of whom 16.5% (n=123) had 32 injuries. Falls represented 66% of all injuries, followed by burns (8%) and poisonings (5%). The proportion of hospitalized cases was 4.8% and the population incidence of hospitalization due to injury was 10.8/1000 children. Socioeconomic factors did not influence the occurrence of injuries.Conclusion The measured incidence of injuries among preschoolers is among the highest in developed countries. Practitioners could contribute more effectively to injury prevention through routine information and counselling of parents from all social backgrounds.