Correcting ocular spherical aberration with soft contact lenses.
Cox, Michael J. Dietze, Holger H.
Cox, Michael J.
Dietze, Holger H.
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2004
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Abstract
Following aberroscopy, aspheric front surface soft contact lenses (SCLs) were custom-made to correct spherical
refractive error and ocular spherical aberration (SA) of 18 myopic and five hypermetropic subjects (age, 20.5
. 5 yr). On-eye residual aberrations, logMAR visual acuity, and contrast sensitivity were compared with the
best-correcting spectacle lens, an equally powered standard SCL, and an SCL designed to be aberration free in
air. Custom-made and spherical SCLs reduced SA ( p . 0.001; p . 0.05) but did not change total root-meansquare (rms) wave-front aberration (WFA). Aberration-free SCLs increased SA ( p . 0.05), coma ( p
. 0.05), and total rms WFA. Visual acuity remained unchanged with any of the SCL types compared with
the spectacle lens correction. Contrast sensitivity at 6 cycles/degree improved with the custom-made SCLs
( p . 0.05). Increased coma with aspheric lens designs and uncorrected astigmatism limit the small possible
visual benefit from correcting ocular SA with SCLs.
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Cox. M.J. and Dietze, H.H. (2004). Correcting ocular spherical aberration with soft contact lenses. Journal of the Optical Society of America. A. Vol. 21, No. 4, pp. 473-485.
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