title: A comparative study in the use of closed-circuit television reading machines and optical aids by patients with retinitis pigmentosa and maculopathy.
abstract: Patients with retinitis pigmentosa (RP) who have insufficient vision to benefit from optical low vision aids are frequently helped by the closed-circuit television (CCTV) reading machines. RP patients' use of the CCTV is compared with that of patients with maculopathy (i.e. a group with a central scotoma only, is compared to a group which also has additional peripheral field loss), and with that of a "normal" control group. The performance of people with RP is improved by using white print on a black background, while macular degeneration subjects have no significant preference. Speed limits appear to be a function of restrictions imposed by the machine. Both groups frequently read faster with "optical aids".
authors: Visual Assessment Department, Moorfields Eye Hospital, London, U.K.
authors: D
authors: D
authors: Ehrlich
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007909:Lenses; D008268:Macular Degeneration / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011932:Reading; D012174:Retinitis Pigmentosa / Q000503:physiopathology*; D013690:Television; D014792:Visual Acuity