What question did this study set out to answer?

The aim is to compare visual acuity between flexible hydrophilic lenses and traditional spectacles, as well as to assess astigmatism on lenses versus the cornea.

March 21, 2026

Comparative Studies

Key Points

The aim is to compare visual acuity between flexible hydrophilic lenses and traditional spectacles, as well as to assess astigmatism on lenses versus the cornea.
Comparison of visual acuity achieved with three types of flexible hydrophilic lenses and spectacles.
Measurement of astigmatism on the lens surface and cornea without a contact lens.
Assessment of comfort levels reported with the lenses.
Variability in visual acuity observed with different flexible hydrophilic lenses compared to spectacles.
Measurements indicate differences in astigmatism present on the lens surface versus the cornea.
Comfort feedback suggests lenses provide excellent comfort but with varied visual results.

Abstract

ABSTRACT A study has been undertaken to compare the visual acuity with three different flexible hydrophilic lenses to the best visual acuity that could be achieved with spectacles. The properties and dimensions of the lenses were varied. A second study is made to compare the astigmatism on the front surface of the flexible lens on the eye to that amount measured on the cornea without a contact lens. The report of excellent comfort with this material, combined with the disturbing reports of unacceptable vision, prompted these investigations.

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