Loteprednol etabonate ophthalmic suspension 0.5?%: efficacy and safety for postoperative anti-inflammatory use

Topical corticosteroids are routinely used as postoperative ocular anti-inflammatory drugs; however, adverse effects such as increased intraocular pressure (IOP) are observed with their use. While older corticosteroids such as dexamethasone and prednisolone acetate offer good anti-inflammatory efficacy, clinically significant increases in IOP (≥10?mmHg) are often associated with their use. Loteprednol etabonate, a novel C-20 ester-based corticosteroid, was retrometabolically designed to offer potent anti-inflammatory efficacy but with decreased impact on IOP. After exerting its therapeutic effects on the site of action, loteprednol etabonate is rapidly converted to inactive metabolites, resulting in fewer adverse effects. Randomized controlled studies have demonstrated the clinical efficacy and safety of loteprednol etabonate ophthalmic suspension 0.5?% for the treatment of postoperative inflammation in post-cataract patients with few patients, if any, exhibiting clinically significant increases (≥10?mmHg) in IOP. Furthermore, safety studies demonstrated a minimal effect of loteprednol etabonate on IOP with long-term use or in steroid responders with a much lower propensity to increase IOP relative to prednisolone acetate or dexamethasone. The anti-inflammatory treatment effect of loteprednol etabonate appears to be similar to that of rimexolone and difluprednate with less impact on IOP compared to difluprednate, although confirmatory comparative studies are needed. The available clinical data suggest that loteprednol etabonate is an efficacious and safe corticosteroid for the treatment of postoperative inflammation.     

AL-2512, a novel corticosteroid: preclinical assessment of anti-inflammatory and ocular hypertensive effects.

The anti-inflammatory efficacy and ocular hypertensive effect of AL-2512 were characterized in rodent and feline models of ocular inflammation. Neutrophil influx into ocular tissue following topical ocular administration of test drugs was evaluated in models of endotoxin-induced uveitis. In rats, the anti-inflammatory efficacy of AL-2512 was compared with that of 0.1% dexamethasone. Test drug or vehicle was administered topically before subplantar injection of endotoxin. Neutrophil influx was assessed at 24 hours. Feline eyes, injected intravitreally with endotoxin, were treated topically with 0.1% AL-2512, 1.0% prednisolone acetate or vehicle at various timepoints before and after endotoxin injection. At 12 hours, protein concentration and leukocyte count in aqueous humor were determined. In the feline intraocular pressure (IOP) model, after baseline IOP values were established, AL-2512, dexamethasone, or vehicle was administered topically to both eyes of cats. IOP was measured daily before and during treatment. Topical ocular administration of AL-2512 inhibited endotoxin-induced leukocyte influx in rodent and feline models of uveitis. In rats, AL-2512 significantly inhibited neutrophil influx by 89%, compared with 93% by dexamethasone. In feline eyes, AL-2512 significantly (p < 0.05) inhibited leukocyte infiltration of aqueous humor by 59%, compared to 37% inhibition by prednisolone acetate. Intraocular pressure in cats treated for 32 days with AL-2512 or dexamethasone increased 6% and 18%, respectively. The ocular anti-inflammatory effect of AL-2512 was equivalent to dexamethasone and superior to prednisolone acetate in rat and feline models of ocular inflammation, respectively. This steroid provides anti-inflammatory efficacy equivalent to dexamethasone with a reduced risk of inducing ocular hypertension.     

Ocular hypertensive and anti-inflammatory responses to different dosages of topical dexamethasone in children: a randomized trial

BACKGROUND: The purpose of the present study was to investigate the ocular hypertensive and anti-inflammatory responses to two different dosage schedules of 0.1% topical dexamethasone in a population of Chinese children undergoing strabismus surgery. METHODS: Children undergoing bilateral strabismus surgeries were randomly assigned to receive topical 0.1% dexamethasone eye drops four times daily (group A) or twice daily (group B) for 4 weeks. Intraocular pressure (IOP) and anti-inflammatory responses were monitored for 8 weeks. RESULTS: A total of 137 children with mean age 6.5 years (SD, 1.9 years; range, 3-10 years) participated in the study. The IOP increased significantly after 4 weeks in both groups compared to the preoperative values (P < 0.001). Peak IOP ranged from 14.0 to 50.3 mmHg in group A and 11.0-41.3 mmHg in group B. Cases in group A (mean, 13.8 mmHg; SD, 8.4 mmHg) had a greater net increase in IOP than cases in group B (mean, 10.2 mmHg; SD, 6.2 mmHg; P = 0.004). Younger-aged children had higher peak IOP (r = -0.244, P = 0.048), and attained the peak IOP earlier (r = 0.252, P = 0.041) in group A. There was no significant difference in ocular inflammatory response between the two groups. CONCLUSION: Ocular hypertensive effect to topical 0.1% dexamethasone is dose and age dependent in children. Twice-daily 0.1% topical dexamethasone eye drops control inflammation after strabismus surgery as effectively as four-times-daily dosage, but induces less increase in IOP, and may be a better treatment schedule.     

A comparative analysis of topical corticosteroids and non-steroidal anti-inflammatory drugs to control inflammation and macular edema following uneventful phacoemulsification

Purpose:To compare the efficacy of topical nonsteroidal anti-inflammatory drugs (NSAIDs) and prednisolone acetate in controlling inflammation and preventing cystoid macular edema (CME) after uneventful phacoemulsification.Methods:All patients who underwent uneventful phacoemulsification from December 2020 to Feb 2021 were included in the study. These were randomly assigned to receive any one anti-inflammatory agent among topical nepafenac (0.1%) [96 eyes], bromfenac (0.07%) [93 eyes], preservative-free ketorolac (0.4%) [94 eyes], nepafenac (0.3%) [96 eyes], or prednisolone acetate (1%) [91 eyes]. The efficacy of the drugs was evaluated by comparing the grade of anterior chamber (AC) cells, conjunctival hyperemia, pain score, visual acuity, intraocular pressure (IOP), and central macular thickness (CMT) at 1 and 6 weeks after surgery.Results:At 1 and 6 weeks, there was no significant difference in pain score, conjunctival hyperemia, AC cells, change in IOP, and visual acuity between the prednisolone and the NSAIDs groups, though nepafenac 0.3% was most effective. At 6 weeks, there was no significant difference in the number of patients developing subclinical CME in the prednisolone versus NSAID group. The mean increase in CMT was significantly lower in nepafenac 0.3% than prednisolone at 1 and 6 weeks (P = 0.003 and 0.004, respectively).Conclusion:NSAIDs used in isolation are comparable to prednisolone in preventing inflammation and pain after uneventful phacoemulsification. However, nepafenac 0.3% is most comparable to prednisolone and more efficacious in reducing the incidence of CME. We recommend that nepafenac 0.3% can be used as a sole anti-inflammatory agent in patients with uneventful phacoemulsification.     

Comparison of prednisolone 1%, rimexolone 1% and ketorolac tromethamine 0.5% after cataract extraction

Purpose To compare the efficacy, safety and patient comfort of two topical steroids (prednisolone 1% and rimexolone 1%) and a topical non-steroidal anti-inflammatory agent (ketorolac tromethamine 0.5%) after extracapsular cataract extraction.Methods Forty-five patients were enrolled in this prospective, randomized, double-blind study. They were assigned to receive topical treatment with either prednisolone, rimexolone or ketorolac tromethamine ophthalmic solution after phacoemulsification for cataract extraction. On postoperative days 1, 3, 5, 14 and 28 best-corrected visual acuity, intraocular pressure (IOP), slit-lamp examination of the anterior segment and report of the patients comfort were assessed and compared by Friedman rank time analysis.Results Regarding the primary outcome efficacy of inflammation control the assessment of cells did not differ (p=0.165), while flare in the anterior chamber was lowest (p=0.008) in the non-steroidal anti-inflammatory drug (NSAID) group. Surface inflammation was lowest with prednisolone (p=0.002). Regarding safety, visual acuity did not differ among the groups. In the prednisolone group one patient, however, responded to steroid treatment with elevated IOP and had to be excluded. In the remaining patients IOP was even lower in the two steroidal treatment groups than with ketorolac (p=0.030). One patient receiving ketorolac had to be excluded because a corneal erosion developed. Patient comfort was highest with prednisolone (p=0.041).Conclusions Ketorolac tromethamine provides good control of intraocular inflammation after cataract extraction without the risk of a steroidal IOP increase, which was also not observed under rimexolone therapy. The best surface inflammation control and patient comfort was observed with prednisolone, which remains a good choice.The authors have no proprietary interest in any of the equipment or materials used in this study.     

Treatment of uveitis-associated refractory ocular hypotony with topical ibopamine

BACKGROUND: Ibopamine is a non-selective dopamine- and adrenalin-receptor agonist that has been shown to cause pupillary dilation and an increase in aqueous humour secretion. This novel drug can be used as a mydriatic agent, as a provocative test in open-angle glaucoma, and for the treatment of persisting ocular hypotony. HISTORY AND SIGNS: This 47-year-old man had a history of uveitis associated with Crohn's disease. Six years after deep sclerectomy for uveitic secondary glaucoma, he developed severe hypotony in his left eye with drop of visual acuity (VA). The hypotony did not respond to topical steroid treatment. 2 % Ibopamine solution was ordered t. i. d. concomitant to 1 % prednisolone acetate. THERAPY AND OUTCOME: Intraocular pressure (IOP) began to rise after 3 weeks of Ibopamine treatment and returned to normal (12 mmHg) with continuous recovery of VA after 8 weeks. Ibopamine was discontinued at an IOP of 16 mmHg after a course of 12 weeks. IOP and VA remained stable during the 12-month follow-up period. CONCLUSIONS: Ibopamine 2 % eye drops in combination with topical steroids are a therapeutic option in uveitis-associated ocular hypotony.     

LASIK术后质量分数0.5％氯替泼诺滴眼液应用的随机对照研究

背景 近视性准分子激光角膜原位磨镶术(LASIK)后需局部使用糖皮质激素滴眼液已成为共识,具有良好抗炎效果且不良反应小的糖皮质激素滴眼液有利于术后角膜上皮的快速修复.目的 评估质量分数0.5％氯替泼诺滴眼液在LASIK术后的临床应用效果.方法 采用前瞻性随机对照研究设计.本研究经中山大学中山眼科中心伦理委员会批准,所有患者纳入前均充分了解本研究的内容并签署知情同意书.112例224眼纳入研究,其中共97例194眼完成随访.双眼接受近视性LASIK的患者以随机数字表法分为0.5％氯替泼诺滴眼液点眼组(试验组)54例108眼和对照组43例86眼,两组患者年龄及术前等效球镜度差异均无统计学意义(P＞0.05).两组的基础治疗方法一致.试验组从术后第1天开始局部点用0.5％氯替泼诺滴眼液,每日4次,共1周,对照组以同样的方法点用妥布霉素地塞米松滴眼液.分别于术后1d、1周、1个月对2个组患者的主观症状进行评分,并行裸眼视力、最佳矫正视力(BCVA)、眼压、中央角膜厚度、角膜荧光素染色检查,同时观查术眼的术中和术后并发症情况,以评价0.5％氯替泼诺滴眼液点眼的安全性.结果 在随访过程中,未观察到与药物相关的全身和眼部严重并发症.术后1d、1周和1个月,试验组和对照组主观症状评分(包括眼痛、异物感、视物模糊评分)比较,差异均无统计学意义(P＞0.05).术后1周,试验组和对照组校正后的实际眼压分别为(16.27±3.31)mmHg和(17.49±4.48)mmHg,差异有统计学意义(t=-2.113,P=0.036);术后1个月,试验组和对照组校正后的实际眼压分别为(15.01±3.22)mmHg和(15.30±4.17)mmHg,差异无统计学意义(t=-0.532,P=0.595).术后1d,试验组发生轻度弥漫性层间角膜炎(DLK)者7眼,对照组为5眼,差异无统计学意义(x2 =0.153,P=0.926),术后1周和1个月两组中均未发现DLK.术后1d、1周和1个月两组间的角膜荧光素染色评分差异均无统计学意义(Z=-0.566,P=0.571;Z=-0.689,P=0.491;Z=-1.628,P=0.103).结论 0.5％氯替泼诺滴眼液用于LASIK术后可以有效控制术后炎症反应和DLK,并且减少了传统糖皮质激素升高眼压的风险.     

Difluprednate 0.05% versus Prednisolone Acetate 1% for Endogenous Anterior Uveitis: Pooled Efficacy Analysis of Two Phase 3 Studies

Purpose: To analyse pooled data from 2 similar phase 3 noninferiority studies comparing difluprednate 0.05% versus prednisolone acetate 1% in patients with endogenous anterior uveitis.

Methods: Patients received difluprednate alternating with vehicle or prednisolone acetate for 14 days (8 drops/day in both groups), followed by tapering from day 14 to 28. All patients were observed until day 42.

Results: More patients on difluprednate than on prednisolone acetate were cleared of anterior chamber cells on day twenty one (71.3% vs 54.7%; p = 0.02); results were similar at the other time points. Treatment withdrawals were higher with prednisolone acetate than difluprednate (19.8% vs 7.4%; log-rank p = 0.02). Study discontinuation due to lack of efficacy was also higher with prednisolone acetate than difluprednate (14.0% vs 0%; p = 0.0002 [pre-specified exploratory analysis]).

Conclusions: More difluprednate-treated eyes were quiet following 21 days of treatment, and difluprednate-treated patients were much less likely to be withdrawn from the study because of treatment failure.     

Topical nepafenac 0.1% alone versus prednisolone acetate 1% as postoperative anti-inflammatory agents in small gauge vitrectomy

Aim:

To compare the efficacy of postoperative topical nepafenac (0.1%) with prednisolone acetate (1%) as anti-inflammatory agents in eyes undergoing Transscleral Sutureless Vitrectomy (TSV).

Settings and Design:

Prospective, double-blind, randomized, single center clinical study.

Materials and Methods:

Eighty eyes of 76 subjects, who underwent small gauge vitrectomy, were included in the study. The subjects who fulfilled the inclusion criteria were randomized to either topical nepafenac only (Group 1) or prednisolone acetate only (Group 2), to be used as postoperative anti-inflammatory agents. The subjects were reviewed on days 1, 30, and 90. Ocular and adnexal inflammation was appropriately graded using the standardized classification. Grading of ocular pain was done on the Visual Analog Scale (VAS).

Statistical Analysis:

The Wilcoxon rank-sum test, using two-sided analysis, was used.

Results:

During the follow-up, both Group 1 and Group 2 did not have a significant difference related to the grade of the anterior chamber inflammation (P > 0.05) or adnexal inflammation (P > 0.05). Pain perception was less in the subjects in Group 1 as compared to subjects in Group 2, but was not statistically significant (P > 0.05).

Conclusion:

Postoperative topical nepafenac was non-inferior to prednisolone acetate in reducing postoperative ocular inflammation in eyes undergoing TSV.     

Effects of loteprednol/tobramycin versus dexamethasone/tobramycin on intraocular pressure in healthy volunteers

PURPOSE: To compare the steroid-induced intraocular pressure (IOP) and other ocular adverse effects of loteprednol etabonate 0.5% and tobramycin 0.3% ophthalmic suspension with those of dexamethasone 0.1% and tobramycin 0.3% ophthalmic suspension. METHODS: Three hundred six healthy volunteers received either loteprednol etabonate/tobramycin (n = 156) or dexamethasone/tobramycin (n = 150) at 4-hour intervals 4 times a day in both eyes for 28 days in this randomized, double-masked, multicenter, parallel-group trial. IOP, visual acuity (VA), and ocular health were assessed at all study visits (days 1, 3, 8, 15, 22, and 29), whereas undilated direct ophthalmoscopy was completed at the baseline and final visits. Adverse events (AEs) were assessed at all follow-up visits. RESULTS: The number of subjects experiencing IOP increases of >or=10 mm Hg from baseline at any study visit for the loteprednol etabonate/tobramycin group (3 subjects, 1.95%) was significantly lower than that for the dexamethasone/tobramycin group (11 subjects, 7.48%; P = 0.0280), as were mean changes from baseline IOP (P < 0.05 at all visits). The lowest VA recorded for any subject at any visit was 20/40 and reductions of >or=2 lines at any visit were observed in 14 (4.55%) eyes for loteprednol etabonate/tobramycin and in 23 (7.82%) eyes for dexamethasone/tobramycin (P = 0.1257). Both treatments were well tolerated. CONCLUSIONS: Loteprednol/tobramycin was significantly less likely to produce elevations in IOP than was dexamethasone/tobramycin in healthy subjects treated for 28 days. Both loteprednol etabonate/tobramycin and dexamethasone/tobramycin were well tolerated with low risks for systemic AEs and ocular AEs other than elevation in IOP for dexamethasone/tobramycin.     

Prophylactic use of timolol maleate to prevent intraocular pressure elevation after Nd-YAG laser posterior capsulotomy

Purpose To evaluate the effective prophylaxis of topical 0.5% timolol maleate for the intraocular pressure rise following Nd-YAG laser posterior capsulotomy. Methods A total of 190 eyes of 184 patients who underwent Nd-YAG laser posterior capsulotomy were randomly assigned to pre-treatment with either topical application of 0.5% timolol maleate (treatment group) or nothing (control group). Results The mean intraocular pressure (IOP) of the treatment group was 14.8 ± 3.0 mmHg before capsulotomy and 15.7 ± 3.4 mmHg after capsulotomy (P > 0.05), whereas IOP was 15.1 ± 3.3 mmHg and 17. 2 ± 4.3 mmHg (P < 0.05) for the control group. There was no statistically significant difference between the two groups with regard to mean IOP before capsulotomy (P > 0.05), but a statistically significant difference was seen between the two groups after capsulotomy (P < 0.05). Six of 91 eyes (6.6%, two with aphakia) in the treatment group had an IOP elevation greater than 6 mmHg compared with 14 of 99 eyes (14.1%, eight with aphakia) in the control group (P < 0.01). Conclusion Pre-treatment with a topical application of 0.5% timolol maleate is effective in preventing IOP elevation after Nd-YAG laser posterior capsulotomy.     

非甾体与甾体类抗炎药物在薄瓣LASIK术后的疗效比较

目的比较非甾体与甾体类抗炎药物在薄瓣准分子激光原位角膜磨镶术（LASIK）后使用的有效性与安全性,为非甾体类抗炎药物在角膜屈光手术后的使用提供临床依据。方法前瞻性随机对照临床研究。收集第三军医大学大坪医院野战外科研究所眼科行薄瓣LASIK手术患者314例（628眼）,采用随机数字法分为氯替泼诺组和溴芬酸钠组各157例（314眼）。分别于术前,术后3 d、15 d、1个月、3个月行视力、电脑验光、眼压（IOP）和裂隙灯显微镜检查。采用重复测量两因素方差分析比较不同观察时间点2组间裸眼视力（UCVA）、球镜度、柱镜度和IOP的差异;混合线性模型分析不同观察时间点UCVA达术前最佳矫正视力（BCVA）的比例;χ2检验比较2组术后弥漫性板层角膜炎（DLK）发生率。结果氯替泼诺组与溴芬酸钠组在观察时间点达到术前BCVA的UCVA比例差异无统计学意义（F=0.717,P＞0.05）。术后15 d氯替泼诺组与溴芬酸钠组球镜度分别为（0.04±0.68）D和（0.16±0.58）D,差异有统计学意义（F=6.184,P＜0.05）;IOP分别为（14.67±4.00）mmHg（1 mmHg=0.133 kPa）和（10.91±2.40）mmHg,差异有统计学意义（F=204.232,P＜0.01）。术后15 d氯替泼诺组高眼压累计发生35眼（11.2%）,溴芬酸钠组无一例发生高眼压。2组间Ⅲ级以下DLK发生率差异无统计学意义（χ2=0.53,P＞0.05）。结论溴芬酸钠滴眼液替代氯替泼诺滴眼液用于薄瓣LASIK术后有良好的抗炎效果,并且减少了术后激素性高眼压的发生率,更有利于术后获得较稳定的屈光状态。     

Comparison of ketorolac tromethamine 0.5% and loteprednol etabonate 0.5% for inflammation after phacoemulsification: prospective randomized double-masked study.

PURPOSE: To compare the efficacy of a topical nonsteroidal antiinflammatory agent (ketorolac tromethamine ophthalmic solution 0.5%) and a topical steroid (loteprednol etabonate ophthalmic suspension 0.5%) in controlling inflammation after cataract surgery. SETTING: Magill Research Center for Vision Correction, Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina, USA. METHODS: Sixty patients were prospectively and randomly assigned to receive topical treatment with ketorolac tromethamine ophthalmic solution 0.5% or loteprednol etabonate ophthalmic suspension 0.5% starting the day after routine phacoemulsification for cataract extraction. Both patient and investigator were masked to treatment. All patients had uneventful small-incision phacoemulsification with placement of a foldable posterior chamber intraocular lens (IOL). Patients used 1 of the 2 antiinflammatory agents 4 times a day starting 24 hours after surgery. Signs and symptoms of inflammation as documented by external slitlamp examination, intraocular pressure (IOP), and Kowa cell and flare measurements were evaluated on postoperative days 1, 4, 7, and 30. RESULTS: There was no statistically significant difference in any measurement of postoperative inflammation between the 2 groups. There was no difference in objective or subjective cell and flare measurements or in IOP between groups. No patient in either group was removed from the study for lack of treatment efficiency. CONCLUSIONS: Ketorolac tromethamine ophthalmic solution 0.5% was as effective as loteprednol etabonate ophthalmic suspension 0.5% in reducing inflammation after routine phacoemulsification and IOL implantation. These results suggest that ketorolac tromethamine 0.5% is a safe and effective antiinflammatory alternative to steroids after cataract extraction.     

Effect of concurrent topical corticosteroid and NSAID therapy of experimental keratitis

The ability of suprofen, a nonsteroidal anti-inflammatory drug, and prednisolone acetate, a corticosteroid, to suppress polymorphonuclear leukocyte invasion of the rabbit cornea during an experimental keratitis was evaluated following topical ophthalmic administration of either drug alone or both drugs concurrently. Suprofen therapy initiated immediately after induction of inflammation was ineffective. However, if suprofen therapy was begun 48 hr prior to the induction of inflammation, the drug was effective. In contrast, prednisolone acetate therapy begun after the induction of inflammation was effective; 48 hr of pretreatment with the corticosteroid produced a marked increase in its therapeutic effect. When administered according to the same regimen, concurrent therapy with suprofen and prednisolone acetate was significantly more effective than treatment with either drug alone. This result was obtained irrespective of whether concurrent therapy was initiated prior to or after the inflammatory event.     

A rabbit model of age‐dependant ocular hypertensive response to topical corticosteroids

Objective: To investigate the ocular hypertensive response to topical dexamethasone (DEX), rimexolone (RIM), loteprednol etabonate (LOT) and fluorometholone (FML) in rabbits of different ages. Methods: Seventy‐five rabbits of three age groups (7 weeks, 6 months and 1‐year old) received topical administration of 0.1% DEX, 1% RIM, 0.5% LOT, 0.1% FML or balanced salt solution four times daily for 1 month. Intraocular pressure (IOP) was monitored at regular time intervals. After a month, eyes were harvested for histological study with haematoxylin and eosin (H&E), periodic acid Schiff and Masson trichrome staining. Trabecular meshwork changes were graded by masked ocular pathologists. Results: Topical DEX caused the greatest increase in IOP, followed by RIM and FML. LOT caused the least IOP increase. Similar pattern of IOP response to the four corticosteroids was observed in the three studied age groups. Young rabbits (7 week) were the most responsive to corticosteroids among the age groups. Extracellular matrix thickening in the trabecular meshwork region and loss of trabecular meshwork cells were observed after DEX, FML or RIM treatments. Conclusion: Young rabbits are more susceptible to steroid induced increase in IOP, even for milder steroids such as fluorometholone and rimexolone.     

Effects of change in intraocular pressure on axial eye length and lens position

PURPOSE: To quantify the biometric changes of ocular dimensions with mechanical elevation of intraocular pressure (IOP) in vivo, to get a better understanding of the elastic properties of the human ocular structures that may play a role in the pathogenesis of various diseases such as myopia or glaucoma. METHODS: Changes in IOP were induced by a suction cup in 18 eyes under cycloplegia. Axial eye length (AEL) and anterior chamber depth (ACD) were measured with non-invasive laser interferometry during elevation of the IOP 10 and 20 mmHg over baseline values and after a 10-min resting period. RESULTS: IOP elevation of 10 and 20 mmHg respectively caused a significant increase of AEL of 23 mum (95% confidence interval: 14-34 microm) and 39 microm (confidence interval (CI): 28-51 microm). After mechanical oculopression, which resulted in an IOP reduction of -5.1 mmHg (CI: -6.3 to -4.0 mmHg) vsbaseline, a significant shortening of -7 microm (CI: -13 to 0 microm) was observed. The change in AEL correlated with the change in IOP (r=0.66, P=0.005). Furthermore, a significant increase in ACD of 30 microm (CI: 24-36 microm) was detected with IOP reduction after oculopression, but no change was seen during IOP elevation. CONCLUSIONS: Biometric changes of the human eye as a response to IOP changes were assessed in vivo. The correlation between change in AEL and IOP found emphasizes the need of in vivoocular rigidity measurements in the human eye.     

Incidence and risk factors for postoperative intraocular pressure response to topical prednisolone eye drops in patients undergoing phacoemulsification

Aim/purpose

To report the incidence, risk factors, and magnitude of steroid response in individuals receiving topical 1% prednisolone acetate eye drops following phacoemulsification surgery

Materials and methods

Postoperative IOP of 1118 consecutive patients who had uneventful cataract surgery and used 1% topical prednisolone acetate were studied. Baseline ocular parameters like best-corrected visual acuity, IOP, and slit-lamp examination findings were noted preoperatively and at postoperative day 30. Incidence of postoperative intraocular pressure response to steroid was analyzed and graded as mild, moderate, or severe and risk factors studied.

Results

The mean age of our study cohort was 59.49?±?7.25 years. The overall incidence of steroid response was 3.2%, (2.8% being moderate responders, and 0.4% high responders). Mean preoperative IOP was 14.67?±?2.2 mm Hg in the study cohort (n?=?1118). Mean postoperative IOP was 21.33?±?7.97 mm Hg in the steroid responder (SR) and 14.66?±?2.8 mm Hg in the non-responder (NR), with a statistically significant difference from the baseline IOP in the SR group (p?<?0.001) and no difference in the NR. Univariate analysis revealed younger age and high axial length as risk factors but on multiple regression analysis, only younger age?<?50 years was found to be a significant risk factor for steroid response.

Conclusion

The overall steroid response in this population post-cataract surgery was low with most being moderate responders. Younger age and higher axial length were identified as risk factors for steroid response, and hence this warrants the judicious use of steroids in such individuals.

     

Changes of intraocular pressure after intravitreal injection of 4mg triamcinolone acetonide in treatment of macular edema

AIM: To investigate the changes of intraocular pressure (IOP) and associated factors of IOP elevation after 4mg intravitreal injection of triamcinolone acetonide (IVTA) in treatment of macular edema. ·METHODS: The study is prospective, consecutive, and non-comparative interventional case series including 93 eyes with macular edema associated with retinal vein occlusion ( =54 eyes) or diabetic retinopathy ( =39 eyes), which received 4mg IVTA injection. The change in IOP was followed for all cases at pre-operation and 14 days, 1, 2, 3, 4, 5, and 6 months post-operation. Associated factors of IOP elevation were examined regarding baseline IOP, causal disease, age and gender. ·RESULTS: IOP increased significantly ( <0.001) at 14 days 16.02 ± 2.45mmHg after injection and peaked at 18.80 ± 6.20mmHg at 2 months post-injection ( <0.001) from 14.85± 2.55 mmHg preoperatively. An IOP rise to the value higher than 21mmHg was observed in 2 (2.2%) eyes 14 days after injection and which was observed in 14 (15.1%), 18 (19.5%), 9(9.6%), 4(4.3%), 0, and 0 eyes respectively at 1, 2, 3, 4, 5, and 6 months after injection. One eye (1.07%) showed pressure elevation of over 5mmHg than baseline 14 days after injection and IOP peaked to 22mmHg (23.7%) at 2 months after injection. Five (5.3%) eyes had an increase of 10mmHg at 1 month and IOP peaked to 12mmHg (12.9%) at 2 months after injection. The rise in IOP was statistically associated with younger age (correlation coefficient -0.18- -0.29, <0.05), high baseline IOP (correlation coefficient 0.52-0.79, all <0.001), and the presence of diabetes mellitus (correlation coefficient 0.23, <0.001) but independent of gender (correlation coefficient -0.002-0.04, all >0.05). In all eyes, IOP could be lowered to the normal range with topical medication, without development of glaucomatous optic nerve head changes. ·CONCLUSION: Elevated IOP after 4mg IVTA injection is common and patients should be monitored beyond 6 months post-injection. In all the cases, IOP can be normalized by topical medication. Patients with high baseline IOP, diabetic retinopathy, and younger age should be carefully monitored for an elevated IOP.     

莫索尼定滴眼液点眼对家兔眼压及血压的影响

目的探讨不同剂量莫索尼定（MOX）滴眼液点眼对眼压、瞳孔、血压和心率的影响。方法 32只家兔全身麻醉后行双眼前房穿刺并连接于生理记录仪描记眼压,行单侧颈动脉插管并连接于生理记录仪描记血压、心率波动。分别将质量分数0.05%、0.1%和0.2%的MOX单侧点眼,同步观察点眼后8h内双侧眼压、瞳孔、血压和心率的变化。结果 0.05%、0.1%、0.2%MOX组点眼后实验眼最大眼压下降幅度分别为3.01mmHg（18.31%）、3.70mmHg（22.13%）和4.46mmHg（25.60%）,降眼压持续时间分别为6h、8h和8h以上。对侧眼眼压下降持续时间较短,最大眼压下降幅度分别为2.64mmHg（15.46%）、3.10mmHg（18.82%）和2.62mmHg（16.48%）。3组MOX滴眼液点眼均可使实验眼瞳孔散大,最大散瞳幅度分别为2.6、3.2、3.9mm。MOX滴眼液点眼对心率影响轻微,0.05%MOX组和0.1%MOX组点眼不影响实验动物的血压,0.2%MOX组可使实验动物舒张压下降,最大下降值为8.85mmHg（9.93%）。结论 MOX滴眼液点眼对家兔有降眼压作用,中低剂量的MOX对实验动物的血压、心率等无明显影响。     

Timolol treatment of chronic open-angle glaucoma and ocular hypertension

Maintenance effect of topical timolol was investigated or 2 years in a group of 125 glaucomatous and ocular hypertensive patients (231 eyes) who had been successfully treated with timolol alone during a 6-month period preceding this trial. Intraocular pressure (IOP) was controlled with timolol alone in 135 of 183 eyes (74%) that completed the study. At the end of the trial 142 eyes (78%) showed an IOP of less than 22 mmHg. Other glaucoma medication had to be added to timolol treatment in 18% of ocular hypertensive and 35% of glaucomatous eyes because of IOP elevation. Elevation of IOP seemed to be due to worsening of glaucoma rather than to decreased efficacy of timolol. None of the ocular hypertensive patients developed visual field defects but in ten glaucomatous patients progression of existing visual field defects was observed in association with elevated IOP. Transient adverse effects were observed in 13% of cases, but timolol treatment had to be stopped in only five cases (4%) because of side effects.