Clinical Ophthalmology (Jul 2023)
Effects of Custom-Designed Soft Contact Lenses on Irregular Astigmatism Correction in Patients with Keratoconus
Abstract
Tomoya Nishida, Takashi Kojima, Saaya Ogi, Takahiro Kataoka, Naoki Isogai, Yoko Yoshida, Tomoaki Nakamura Nagoya Eye Clinic, Nagoya, JapanCorrespondence: Takashi Kojima, Nagoya Eye Clinic, Namiyose-cho 24-14, COLLECT MARK kanayama 2F atsuta-ku, Nagoya, 456-0003, Japan, Tel +81- 52-872-0490, Fax +81- 52-872-0491, Email [email protected]: To evaluate the efficacy of YOUSOFT soft contact lenses in correcting irregular astigmatism and prescription results of patients with keratoconus.Patients and Methods: The retrospective observational study included 55 eyes (mean age, 32.2 ± 10.6 years; 36 men and 6 women) of 42 patients with keratoconus who tried YOUSOFT for rigid gas permeable (RGP) lens intolerance. Average keratometry, corneal astigmatism, and maximum keratometry were 49.4 ± 5.2 diopters (D), 3.7 ± 2.1 D, and 57.3 ± 8.2 D, respectively. Patients were divided into YOUSOFT prescription and non-prescription cases, wherein the prescription rates were calculated. YOUSOFT visual acuity was compared with spectacle-corrected distance visual acuity (CDVA) and RGP lens-CDVA.Results: YOUSOFT was prescribed to 28 out of 42 patients (prescription rate 67%). In the YOUSOFT prescription cases, YOUSOFT-CDVA (logMAR − 0.04; 95% confidence interval [CI]: − 0.08 to 0.00) was significantly better than spectacle-CDVA (logMAR 0.23; 95% CI: 0.08 to 0.38; P < 0.0001), whereas YOUSOFT-CDVA (logMAR − 0.03; 95% CI: − 0.08 to 0.03) did not significantly differ from the RGP lens-CDVA (logMAR − 0.02; 95% CI: − 0.08 to 0.04; P = 0.856).Conclusion: YOUSOFT was effective in correcting irregular corneal astigmatism, suggesting that it is highly effective in patients with RGP lens intolerance.Keywords: rigid gas-permeable contact lens intolerance, YOUSOFT soft contact lens, visual acuity, prescription rate
