Higher-Order Aberrations and Visual Performance in Myopic Children Treated With Aspheric Base Curve-Designed Orthokeratology.

Abstract

OBJECTIVES:

To investigate the impact of aspheric base curve (BC)-designed orthokeratology (ortho-k) (AOK) lenses on higher-order aberrations (HOA) at different pupil diameters and visual performance.

METHODS:

This prospective clinical study included subjects randomized to wear spherical BC-designed ortho-k (SOK) or AOK lenses. The Pediatric Refractive Error Profile (PREP) questionnaire was completed before and after 3 months of lens wear. The Strehl ratio (SR) and root mean square of ocular higher-order aberrations (HOAs), spherical aberration (SA), coma, and trefoil were measured under 4-mm, 5-mm, and 6-mm pupil diameters at baseline and 3-month visits. Corneal topography, uncorrected low-contrast (LC) visual acuity (VA), and high-contrast (HC) VA were measured at baseline and at 1 day, 1 week, 1 month, and 3 month follow-ups.

RESULTS:

Sixty-five participants completed the study. After 3 months with the ortho-k lens, there were no significant differences in ocular HOA, SA, coma, or trefoil between the SOK group and AOK group at 4-mm, 5-mm, and 6-mm pupil diameters (all P>0.05), except for a significant increase in SA in the AOK group (P=0.01). Stratified analyses showed that the AOK group exhibited greater HOA and SA at 5-mm and 6-mm pupil diameters in the lower myopia subgroup and greater SA at 6 mm in the higher myopia subgroup (all P<0.05). There were no significant differences between the groups in SR, HC VA, LC VA, or PREP scores (all P>0.05).

CONCLUSION:

Aspheric BC-designed ortho-k lenses produced a significantly greater SA than SOK lenses, with more significance at lower diopters, without sacrificing subjective visual performance.

• Authors: Changxu Chen, Wei Ma, Jianglan Wang, Bi Yang, Tong Liu, Longqian Liu
• Journal: Eye & contact lens (Eye Contact Lens) Vol. 49 Issue 2 Pg. 71-76 (Feb 01 2023) ISSN: 1542-233X [Electronic] United States
• PMID: 36694310 (Publication Type: Randomized Controlled Trial, Journal Article)
• Copyright: Copyright © 2022 Contact Lens Association of Ophthalmologists.

Topics

• Humans
• Child
• Refraction, Ocular
• Prospective Studies
• Coma
• Visual Acuity
• Myopia (therapy)
• Corneal Topography