[A telescopic system for distance consisting of contact lens and spectacle lens for low vision patients].
A telescopic system for distance consisting of a negative contact lens (-10.0 - -20.0 D) as the eye piece and a positive spectacle lens (+8.0 - +16.0 D) as the objective, a modification of the Galilean telescope was examined. First the system was tried in 15 normal subjects, whose visual acuity was reduced to 20/200 or less by providing several occlusion membranes, and results were compared with customary full correction for distance. The best improvement of their vision by this system was achieved when the dioptric power of the spectacle was between +11.0 D and +13.75 D. This system was then applied to 78 eyes (61 patients) with visual acuity of 20/100 or less. Subjective improvement of vision was found in 55% of those patients' eyes. Eight patients out of 26 patients whose better eye acuity was 20/100 or less wanted to use this system and received prescription to result in the visual improvement, as evidenced by their continued use. This system can provide aid for low vision correction for distance.
Takahara
M
M
Department of Ophthalmology, Tokyo Medical and Dental University School of Medicine, Bunkyo-ku, Japan.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003261:Contact Lenses; D004215:Distance Perception; D005139:Eyeglasses; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015354:Vision, Low / Q000534:rehabilitation / Q000628:therapy*; D014792:Visual Acuity; D014794:Visual Fields