Variation in near visual acuity with illuminance for a group of 27 partially-sighted people

Abstract

This paper reports on the improvements in near visual acuity with increasing task illuminance for a group of partially-sighted people with various visual defects. The experimental method employed a technique which allows the easy transfer of experimental results to practical design. Comments are also made on the design of the visual environment for the partially sighted.

Quality of light and quality of life – the effect of lighting adaptation among people with low vision

“…, 1973; Hartmann et al. , 1980; Julian, 1984; LaGrow, 1986; Eldred, 1992; van der Wildt et al. , 1994; Sörensen and Brunnström, 1995).…”

“…Whether the lighting in itself or the improved lighting environment have affected the vision is not possible to say. There is however strong evidence from previous studies that reading ability is markedly improved by increased illumination (Sloan et al, 1973;Hartmann et al, 1980;Julian, 1984;LaGrow, 1986;Eldred, 1992;So¨rensen and Brunnstro¨m, 1995).…”

Vision, light and aging: A literature overview on older-age workers

“…It has also been interpreted as a violation to human rights not to provide reasonable accommodation of a workplace for workers with visual impairments as described by Robertson [7]. Improvement in visual function can also be achieved with optimal levels of lighting which can improve visual acuity and contrast sensitivity (dB) [7][8][9][10] resulting in advantages such as increased reading performance [11][12][13][14][15][16][17][18][19]. But increasing the illumination level and adjusting improperly positioned lighting for the elderly often results in light scattering in the increasingly opaque crystalline lens (known as cataract), which then increases the risk of blurred vision and glare [20,21].…”

Reading performance with various lamps in age‐related macular degeneration

“…, 2001; Fosse and Valberg, 2004; Haymes and Lee, 2006) and improved visual acuity (VA) and contrast sensitivity (CS) (Silver et al. , 1978; Julian, 1984; Cohen and Rosenthal, 1988; Haymes and Lee, 2006). Based on this evidence, eye‐care practitioners commonly recommend the use of a lamp placed near the task to people with low vision; this is often referred to as local or localised lighting.…”