What question did this study set out to answer?

The aim is to determine the supplemental power effect of Bausch and Lomb SOFLENS contact lenses and its correlation with corneal curvature.

March 21, 2026

Corneal Curvature and Supplemental Power Effect of the Bausch and Lomb Soflens ® Contact Lens

Key Points

The aim is to determine the supplemental power effect of Bausch and Lomb SOFLENS contact lenses and its correlation with corneal curvature.
Sample of 54 eyes analyzed for supplemental power effect.
Measured mean value of +0.34 D with standard deviation of ±0.37 D.
Evaluated lens-cornea alignment for apical radius.
Significant correlation between supplemental power effect and lens-cornea relationship (p < 0.01).
Optimal alignment occurs when the lens radius is 0.5 mm flatter than the cornea's flat radius.

Abstract

ABSTRACT The supplemental power effect (SPE) of F series Bausch and Lomb SOFLENS ® (polymacon) Contact Lenses was determined for a sample of 54 eyes. The mean value was +0.34 D = S.D. ±0.37D, range zero to +1.00 D. A significant correlation was present between the SPE and the apical lens‐cornea bearing relationship. ( p < 0.01). The results of this study provide refractive evidence that a central lens‐cornea alignment is achieved when the posterior apical radius of the lens is about 0.5 mm flatter than the flat radius of the cornea, S.D.±0.35 D. This information is clinically useful in assessing the patient's visual response as well as the fit of the lens.

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