Department of Ophthalmology, Christian Medical College, Vellore, Tamil Nadu, India.
School of Optometry, Christian Medical College, Vellore, Tamil Nadu, India.
Indian J Ophthalmol. 2021 Jan;69(1):127-129. doi: 10.4103/ijo.IJO_142_20.
To identify children with low vision from two local schools for the blind, to provide low vision devices (LVD) to those who may benefit from it, and to encourage them to learn print.
A prospective study was conducted among children from two local schools for the blind. Best-corrected visual acuity (BCVA) was done using the Snellen chart. Children with BCVA of counting finger (CF) 1/2 meter or more in the better eye underwent low vision assessment. Distant vision was assessed using the Feinbloom chart and near vision was assessed using the Lea symbol chart. Low vision devices (LVD) were prescribed as required.
Among 185 children enrolled, 31 children had BCVA of >CF ½ meter. Using a telescope, distant vision was better than 3/36 in 48.4%, 3/36-3/12 in 16.2%, and 3/9.5 to 3/3 in 35.4%. Among 23 children who read 1M at <10 cm, 22.6% could read 0.6-0.8M, and 25.8% could read 1M using LVD.
Regular screening of children in schools for the blind could identify children who might benefit from LVD. A review of protocols for the entry of children in schools for the blind by screening these children by a specialist team prior to admission should be made mandatory.
从当地两所盲人学校中发现低视力儿童，为那些可能从中受益的儿童提供低视力设备（LVD），并鼓励他们学习印刷品。
对来自当地两所盲人学校的儿童进行前瞻性研究。使用 Snellen 图表测量最佳矫正视力（BCVA）。在较好的眼睛中，BCVA 为指数/半米或以上的儿童接受低视力评估。使用 Feinbloom 图表评估远距离视力，使用 Lea 符号图表评估近距离视力。根据需要规定低视力设备（LVD）。
在登记的 185 名儿童中，有 31 名儿童的 BCVA 大于指数/半米。使用望远镜时，48.4%的儿童远距离视力优于 3/36，16.2%的儿童为 3/36-3/12，35.4%的儿童为 3/9.5-3/3。在 23 名在<10cm 处阅读 1M 的儿童中，22.6%的儿童使用 LVD 可以阅读 0.6-0.8M，25.8%的儿童可以阅读 1M。
对盲人学校的儿童进行常规筛查，可以发现可能受益于 LVD 的儿童。应强制要求由专家小组对这些儿童进行入学前筛查，以审查盲人学校儿童的入学协议。
