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Contrast sensitivity with contact lens corrections for presbyopia
Author(s) -
Collins Michael J.,
Brown Brian,
Bowman Kenneth J.
Publication year - 1989
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1989.tb00832.x
Subject(s) - presbyopia , contact lens , contrast (vision) , optics , lens (geology) , optometry , ophthalmology , physics , medicine
We measured contrast sensitivity at three distances (330 mm, 660 mm and 4 m) with six contact lens and two multifocal spectacle corrections for presbyopia. The two spectacle corrections were D‐segment bifocals and trifocals and the contact lens corrections were distance contact lenses with lookover spectacles, soft progressive bifocals, soft concentric bifocals, monovision, modified monovision, and hard crescent segment bifocals. The spectacle corrections in general gave better results for the contrast sensitivity function (CSF), than did the contact lens corrections. Distance contact lenses with lookover spectacles performed best of the contact lens corrections used. However, the differences in CSF between the various contact lens corrections were small and not statistically significant.