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Central and peripheral contrast sensitivity for static and dynamic sinusoidal gratings in glaucoma
Author(s) -
Lundh Björn L.
Publication year - 1985
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1985.tb05233.x
Subject(s) - peripheral , glaucoma , contrast (vision) , sensitivity (control systems) , spatial frequency , visual field , fixation (population genetics) , ophthalmology , optics , medicine , optometry , audiology , physics , population , environmental health , electronic engineering , engineering
. Contrast sensivity testing in glaucoma patients was extended from central, static patterns to include peripheral areas and dynamic gratings. The results were compared with age‐matched normals in visuo‐grams, and sensitivity defects were correlated to the location of visual field defects. Tested spatial frequencies included 0.3, 0.5 1, 2 and 4 c/d. Definite sensitivity losses for all spatial frequencies were found for dynamic patterns in testing positions located 10° eccentrically above and below fixation. For static patterns in the periphery sensitivity was reduced only for medium spatial frequencies. For central viewing, reduced sensitivity was found with dynamic medium spatial frequencies only. No centrally presented static gratings were of subnormal sensitivity. Dynamic patterns in the periphery were superior to other combinations regarding the capacity for indicating the presence of glaucomatous influence. Peripheral sensitivity losses also occurred when perimetric disturbances were located outside the area tested in the same hemi‐field. Depressed sensitivity was observed even in hemifields with normal/near‐normal perimetric fields. These findings might be indicative of an early glaucomatous impairment. It thus seems that testing peripheral dynamic contrast sensitivity might be a potentially valuable method for glaucoma screening.