山东滕州市农村小学生弱视斜视及立体视锐度调查

Objective To investigate the visual acuity, stereoacuity and the prevalence of amblyopia and strabismus ofprimazy school children in rural areas in Tengzhou, Shandong as well as to evaluate the effi-ciency of three methods in screening amblyopia. Methods In this population-based study, children aged 5 to 14 years old in primary school were randomly selected by a cluster sampling in which school shift was the sam- piing unit. Titmus stereo-test, visual acuity (VA), cover-test and ocular motility evaluation were examined for each child. Retinoscopy was performed for children with VA < 1.0 in either eye. Results ( 1 ) Of 2668 effec-tive examinatious,369 eases (13.83%) were poor eyesight. (2) The prevalence ofamblyopia and strabismus were 1.50% and 1.72% respectively. Out of 40 amblyopia children, 39 were screened at the first time. (3) The stereoacuity in normal children was 40″, 31 (77.5%) children with amblyopia showed abnormal stereoacuity,while 28.3% for strabismus. (4) Specificity and crude agreement of combined Titmus with VA were 99.47%and 99.06% ,which were highest in the three methods. The second was Titmus stereo-test with 97.98% and 97.59%, VA was the lowest. Conelusion The most important cause of poor eyesight in primary school chil-dren is myopia. Amblyopia and strabismus might have significantly effects on stereoacuity. The most efficient method of screening amblyopia was stereo-test combined with visual acuity.

Population-based survey of amblyopia, strabismus and stereoacuity in school-aged children in Tengzhou District, Shandong