Fig 1.
LED light frame with Pelli-Robson chart.
Table 1.
Demographic data of subjects.
Table 2.
Mean ± standard deviation of visual function, reading speed and visual comfort of subjects with mild, moderate and severe low vision under different illumination level.
Table 3.
Mean and standard deviation of changes (log difference) in visual function, reading speed and visual comfort of subjects with mild, moderate and severe low vision at different illumination level compared to baseline.
Table 4.
Statistical findings of visual functions, reading speed and visual comfort.
Fig 2.
Change of visual function, reading speed and visual comfort across five illumination levels.
(a) distance visual acuity. (b) near visual acuity. (c) distance contrast sensitivity. (d) near contrast sensitivity. (e) reading speed. (f) visual comfort.
Table 5.
Standard illumination level recommended for classroom at different countries.