PMID: 11327678May 1, 2001Paper

Retinal illuminance and the dissociation of letter and grating acuity in age-related macular degeneration

Optometry and Vision Science : Official Publication of the American Academy of Optometry
P FosseH M Arnljot

Abstract

To report on the differential effect of retinal illuminance on letter and grating acuity. For 13 subjects with age-related macular degeneration (ARMD) and four subjects with normal vision, standard distance and near letter acuity, as well as grating acuity data were obtained at mesopic to high-photopic light levels. In general, both acuity forms improved with increasing light level, but not in proportion with one another. The ratio of letter/grating acuity separated the ARMD subjects into two subgroups, one with relatively low letter acuity scores for which the dissociation of the two acuity forms increased with retinal illuminance, and another with higher letter acuity values for which the ratio converged toward unity. These findings demonstrate that both letter and grating acuity increase with retinal illuminance and that equating grating acuity with optotype acuity is untenable in subjects with ARMD, irrespective of light levels. The latter conclusion is of importance whenever acuity is used as a criterion to classify the visually impaired with regard to their legal and social status.

References

Feb 1, 1979·Archives of Ophthalmology·G Westheimer
Nov 1, 1989·Optometry and Vision Science : Official Publication of the American Academy of Optometry·J M White, D S Loshin
Nov 1, 1989·Optometry and Vision Science : Official Publication of the American Academy of Optometry·P R Herse, H E Bedell
Nov 1, 1973·American Journal of Ophthalmology·L L SloanK Feiock
Jan 1, 1969·Documenta Ophthalmologica. Advances in Ophthalmology·L L Sloan
Aug 1, 1984·Ophthalmology·D L MayerD Rodier
Oct 1, 1984·Behavioural Brain Research·L Reymond, M Cook
Aug 1, 1983·American Journal of Optometry and Physiological Optics·B Brown, J L Kitchin
Apr 1, 1995·Acta Ophthalmologica Scandinavica·H Hirvelä, L Laatikainen
Jan 1, 1997·Perception·J Häkkinen, G Nyman
Nov 20, 1937·The Journal of General Physiology·S Shlaer

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Citations

Jul 13, 2011·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Ava K BittnerGislin Dagnelie
Jul 2, 2004·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Gunilla BrunnströmJohan Sjöstrand
Feb 8, 2006·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Sharon A Haymes, Jenny Lee
Mar 19, 2008·Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie·Phil HooperElizabeth Russell-Minda
Jan 10, 2002·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Arne Valberg, Per Fosse
Apr 24, 2016·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Laurence P TidburyDavid Newsham
Nov 16, 2006·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Stamatina A Kabanarou, Gary S Rubin
Aug 16, 2019·Documenta Ophthalmologica. Advances in Ophthalmology·William H Ridder
Apr 19, 2020·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Rebecca HenryWalter Wittich
Mar 1, 2012·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Shahina PardhanAhalya Subramanian

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