Abstract:  Objective To explore the effects of a computer lens filter (CLF) on patients with retinitis pigmentosa (RP) on visual quality. Design Prospective case series. Participants A total of 22 patients with binocular RP were studied in the Low Vision Center of the Optometry Hospital affiliated to Wenzhou Medical University from March 2018 to June 2018. Methods All patients underwent refractive error correction. Mars contrast sensitivity table was used to measure the bright contrast sensitivity before and after wearing the CLF, the time required to read the same text on the computer screen was measured with a timer. The comfort and perception for the brightness of the display screen after wearing the CLF were scored with a score table. Main Outcome Measures Bright contrast sensitivity, reading speed, visual comfort, perception for brightness. Results The visual comfort score of RP patients before wearing CLF was set to 0, after wearing CLF it significantly increased to 4.0±2.8 (t=6.897, P<0.001). The perception score for the brightness of display of RP patients before wearing CLF was set to 0, and after wearing the CLF it decreased significantly, which was -2.8±2.4 (t=-5.412, P<0.001). The bright contrast sensitivity was 1.0±0.5 logCS in RP patients before wearing the CLF, but no significant change was 1.0±0.5 logCS after wearing the CLF (t=0.68, P=0.504). The screen reading speed of RP patients before wearing CLF was 209.1±95.0 (words/min), which was not significantly improved after wearing CLF, and was 210.2±92.8 (words/min)(t=-0.233, P=0.826). Conclusion CLF can improve the reading comfort of computer display screen and reduce the perception of brightness of display screen for RP patients. (Ophthalmol CHN, 2024, 33: 116-119)

Key words:  retinitis pigmentosa, computer lens filters