Investigation of Contrast Visual Acuity with Rigid Gas Permeable Contact Lenses After Penetrating Keratoplasty

Overview

Journal BMC Ophthalmol

Publisher Biomed Central

Specialty Ophthalmology

Date 2023 Jan 9

PMID 36624403

Authors

Ju Zhang

Xiao Lin

Xinhai Wang

Zhiwei Cheng

Xiaoxiao Li

Jicang He

Weiyun Shi

Hua Gao

Affiliations

Soon will be listed here.

Abstract

Background: To investigate the effects of rigid gas permeable contact lens (RGP-CL) wear on contrast visual acuity in patients after penetrating keratoplasty.

Methods: Nineteen patients (19 eyes), aged 30.45 ± 5.83 years, who had received penetrating keratoplasty and were successfully fitted with RGP-CLs at our hospital from July 2017 to June 2018 were included. Contrast visual acuities at 100%, 25%, and 10% with spectacles and RGP-CLs were analyzed using the Chi-square test. The wavefront aberrations at the anterior surface of the cornea before and 1 month after RGP-CL wear were compared using the matched sample t-test.

Results: The mean best spectacle-corrected visual acuities were 0.390 ± 0.135 logMAR, 0.706 ± 0.182 logMAR, and 0.952 ± 0.223 logMAR at the 100%, 25%, and 10% contrast levels, respectively, which were significantly lower than the RGP-CL-corrected visions at the three levels (0.255 ± 0.133 logMAR, 0.488 ± 0.168 logMAR, and 0.737 ± 0.159 logMAR; all P < 0.001). The vision losses with RGP-CLs were 0.231 ± 0.099 logMAR and 0.466 ± 0.094 logMAR at the 25% and 10% contrast levels, respectively. The Zernike spherical aberration Z was reduced from 3.734 ± 1.061 μm to 2.622 ± 0.725 μm after wearing the RGP-CLs (P ≤ 0.001). The astigmatism parameters of Z and Z were also reduced from 3.761 ± 2.309 μm and 3.316 ± 2.147 μm to 2.637 ± 1.722 μm and 2.016 ± 1.184 μm, respectively (P < 0.05).

Conclusion: For post-keratoplasty patients, RGP-CLs can help to improve visual performance, especially low contrast visual acuity. The improvement may be related to the reduction of corneal aberrations, mainly the spherical and astigmatism aberrations.

Citing Articles

Wavefront-guided pupilloplasty in patients following penetrating keratoplasty: Optimizing results.

Sharma V, Divyashree G, Preeti , Ambiya V, Kumar A, Khullar S Indian J Ophthalmol. 2024; 73(1):73-76.

PMID: 39292522 PMC: 11831946. DOI: 10.4103/IJO.IJO_3346_23.

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