Impact of low vision rehabilitation on functional vision performance of children with visual impairment

ABSTRACT

To evaluate the impact of low vision rehabilitation on functional vision of children with visual impairment. The LV Prasad-Functional Vision Questionnaire, designed specifically to measure functional performance of visually impaired children of developing countries, was used to assess the level of difficulty in performing various tasks pre and post visual rehabilitation in children with documented visual impairment. Chi-square test was used to assess the impact of rehabilitation intervention on functional vision performance; a P < 0.05 was considered significant. LogMAR visual acuity prior to the introduction of low vision devices [LVDs] was 0.90 +/- 0.05 for distance and for near it was 0.61 +/- 0.05. After the intervention, the acuities improved significantly for distance [0.2 +/- 0.27; P < 0.0001] and near [0.42 +/- 0.17; P = 0.001]. The most common reported difficulties were related to their academic activities like copying from the blackboard [80%], reading textbook at arm's length [77.2%], and writing along a straight line [77.2%]. Absolute raw score of disability pre-LVD was 15.05 which improved to 7.58 post-LVD. An improvement in functional vision post visual rehabilitation was especially found in those activities related to their studying lifestyle like copying from the blackboard [P < 0.0001], reading textbook at arm's length [P < 0.0001], and writing along a straight line [P = 0.003]. In our study group, there was a significant improvement in functional vision post visual rehabilitation, especially with those activities which are related to their academic output. It is important for these children to have an early visual rehabilitation to decrease the impairment associated with these decreased visual output and to enhance their learning abilities