Preliminary observations concerning treatment of visual discomfort and associated perceptual distortion
- 1 April 1992
- journal article
- Published by Wiley in Ophthalmic and Physiological Optics
- Vol. 12 (2), 257-263
- https://doi.org/10.1111/j.1475-1313.1992.tb00302.x
Abstract
A system for therapeutic precision tinting is described. Some individuals who are subject to perceptual distortion of text no longer perceive the distortion when the text has a particular colour. A simple colorimeter enables an observer to illuminate text with light of a particular chromaticity. varying first CIE 1976 hue angle (huv). then saturation (suv), and then luminance, to obtain a setting that maximizes visual comfort and reduces any perceptual distortion. The colorimeter setting is then matched by a combination of tinted trial lenses. The combination uses only two dyes at a time from a selection of seven, unless a dark lens is required, when a third neutral (grey) dye is added. The subject observes both text and a normal scene when wearing tinted trial lenses. A variety of trial lenses are compared including those that match the colorimeter setting and others with similar hue angle. Spectacle lenses are then limed so as lo have a spectral transmission identical to that of the chosen combination of trial lenses. Certain patients with reading disorders, eye‐strain, headaches or photosensitivy epilepsy report benefit when wearing spectacles limed according to the above techniques. The physiological basis for the therapeutic effects is uncertain, but may involve a selective impairment of luminance or colour‐difference channels.Keywords
This publication has 8 references indexed in Scilit:
- Colorimeter for the intuitive manipulation of hue and saturation and its role in the study of perceptual distortionOphthalmic and Physiological Optics, 1992
- Colour and visual discomfort in migraineursThe Lancet, 1991
- Tinted lenses and related therapies for learning disabilities – a reviewOphthalmic and Physiological Optics, 1991
- Some visual, optometric and perceptual effects of coloured glassesOphthalmic and Physiological Optics, 1991
- The Ischemic Hypotheses of MigraineArchives of Neurology, 1987
- Trichromacy, opponent colours coding and optimum colour information transmission in the retinaProceedings of the Royal Society of London. B. Biological Sciences, 1983
- A Colorimeter for Research in Color PerceptionPublished by University of Illinois Press ,1952