Contrast Sensitivity Function Scores, Choices of Illuminated Stand Magnifiers, and Reading

Autor/in	Gerritsen, Bryan
Titel	Contrast Sensitivity Function Scores, Choices of Illuminated Stand Magnifiers, and Reading
Quelle	In: Journal of Visual Impairment & Blindness, 104 (2010) 4, S.239-243 (5 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0145-482X
Schlagwörter	Vision; Lighting; Visual Impairments; Visual Acuity; Measurement Techniques; Assistive Technology; Reading + Suchen Sie Ihr Suchwort? Beleuchtung; Visual handicap; Sehbehinderung; Optisches Differenzierungsvermögen; Messtechnik; Leseprozess; Lesen
Abstract	Far too often, professionals focus almost solely on individuals' needs for magnification level for reading. Visual acuities are measured and decisions are made for low vision devices largely on the basis of acuity levels. Contrast sensitivity function is often overlooked as a critical need for and predictor of the selection and preference for low vision devices. In this article, the author discusses the correlation between contrast sensitivity function and illumination needs; measurements of the levels of the reflective illuminance of current illuminated stand magnifiers; and calls for further study of the relationship among contrast sensitivity function, illumination needs, and preferences for low vision devices for reading. The author reviews the preference by many individuals with low scores on contrast sensitivity function for low vision devices with bright illumination, and presents a study of the measurements of the reflectance illumination of major illuminated stand magnifiers. (Contains 1 table.) (ERIC).
Anmerkungen	American Foundation for the Blind. 11 Penn Plaza Suite 300, New York, NY 10001. Tel: 800-232-5463; Tel: 212-502-7600; e-mail: afbinfo@afb.net; Web site: http://www.afb.org/store
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10