Effects of myopic spectacle correction and radial refractive gradient spectacles on peripheral refraction.
The recent observation that central refractive development might be controlled by the refractive errors in the periphery, also in primates, revived the interest in the peripheral optics of the eye. We optimized an eccentric photorefractor to measure the peripheral refractive error in the vertical pupil meridian over the horizontal visual field (from -45 degrees to 45 degrees ), with and without myopic spectacle correction. Furthermore, a newly designed radial refractive gradient lens (RRG lens) that induces increasing myopia in all radial directions from the center was tested. We found that for the geometry of our measurement setup conventional spectacles induced significant relative hyperopia in the periphery, although its magnitude varied greatly among different spectacle designs and subjects. In contrast, the newly designed RRG lens induced relative peripheral myopia. These results are of interest to analyze the effect that different optical corrections might have on the emmetropization process.
Tabernero
Juan
J
Section of Neurobiology of the Eye, Ophthalmic Research Institute, Calwerstrasse 7/1, 72076 Tuebingen, Germany. juan.tabernero@klinikum.uni-tuebingen.de
Vazquez
Daniel
D
Seidemann
Anne
A
Uttenweiler
Dietmar
D
Schaeffel
Frank
F
D000328:Adult; D005139:Eyeglasses / Q000009:adverse effects; D006801:Humans; D006956:Hyperopia / Q000209:etiology; D009216:Myopia / Q000503:physiopathology / Q000628:therapy*; D012029:Refraction, Ocular; D042262:Retinoscopy / Q000379:methods; D014794:Visual Fields / Q000502:physiology