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The effect of refractive error on perimetric thresholds using the Humphrey Field Analyser

Five normal young (20 ± 5 years) subjects had the central and peripheral fields of their right eyes measured using the Humphrey Field Analyser under emmetropic conditions and fitted with 38 per cent water content Hema spherical contact lenses to simulate distance refractive errors of 4 D, 6 D, 8 D, and 10 D of both myopia and hyperopia. The results for each induced refractive state were merged and averaged so that comparisons could be made with the averaged normal results.