Experimental Investigation on Corneal Astigmatism Fitted With Disposable Soft Toric Contect Lanses

OPTEMETRY

In two publications that examined the myths and realities of CL fitting and wear, Ephron and colleagues talked about how practitioner and customer attitudes change more slowly than technology and knowledge, which move very quickly. In the study, 30 patients with soft tori lenses had a corneal astigmatism greater than 1.25 D or between 0.75 and 1.25 D (22 eyes; Group B), and 30 patients with soft spheric lenses had a corneal astigmatism between 0.75 and 1.25 D or less than 0.75 D (23 eyes; Group D). For all patients, corneal topography, autorefractometry, biomicroscopic characteristics, corrected and uncorrected monocular visual acuity measurement with log MAR, and both were done before and at least 20 minutes after contact lens application. Three criteria were used to measure the effectiveness of contact lens fittings: astigmatic neutralization, visual success, and retinal deviation. differences between spherical and tori contacts. The 60 subjects had a mean age (6SD) of 27.565.0 years, a spherical refractive error of 23.6862.01 D, and a cylinder refractive error of 21.2860.36 D. In terms of high- and low-contrast visual acuities, tori lenses performed better than spherical lenses both during the fitting process (tori high-contrast: 20.06560.078 and low-contrast: 0.13360.103 vs. spherical high-contrast: 0.00160.104 and low-contrast: 0.22460.107; and follow-up; tori high-contrast: 20.08360.0. When tori contact lenses were fitted, electromyography-measured eyestrain was less with them than with spherical lenses, but not at the follow-up.

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