The aspheric ablation designed to expand near functional vision was effective and stable over 12 months. The wavefront-customized hyperopic treatment significantly reduced spectacle dependence.

This article describes experiments designed to investigate reading speed and working distance for students with low vision. Six fourth grade students were asked to read unrelated words and continuous text ranging in print size. This article also discusses methods to maximize reading efficiency of students with low vision.

Abstract— The visual performance of TFT‐LCDs and CRT displays with different pixel densities were measured using task‐oriented tests and subjective measures of visual comfort and preferences. The effect of resolution on displayed letter legibility was measured. The legibility of letters increases with increasing pixel resolution. At a viewing distance of 50 cm, no significant differences were obtained in letter‐counting rates of capital letters 24 arcmin high, or reading rates of mixed‐case letters with 16 arcmin x‐height. In a second study for small letters, differences in letter‐counting and reading speeds were obtained for the different display conditions. For capital letters about 1.5 mm high, the letter‐counting speed was about 6% faster for a 157‐ppi TFT‐LCD than for a CRT. On 83‐ppi TFT‐LCD, letters this small could not be adequately rendered and were unrecognized. At a 50‐cm viewing distance, some subject preference and improved visual comfort was obtained for the high‐resolution TFTLCD.

This article presents conceptual models of relationships between print size and reading speed and preferred viewing distances. These models illustrate how various factors can influence reading behaviors and influence decisions about the optimal angular size of print and resolution reserve.