Baseline Accommodation and Binocular Vision Measures in Malay Schoolchildren Enrolled in the Myopia Control Study Using Spectacle Lenses in Kuala Lumpur

• Published in: Clinical Optometry
• Main Author: Norazman F.N.N.; Mohd-Ali B.; Syed Mohd Dardin S.F.; Mohamad Shahimin M.; Mohamad Fadzil N.; Mohd Saman M.N.; Mohidin N.
• Format: Article
• Language: English
• Published: Dove Medical Press Ltd 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85185658691&doi=10.2147%2fOPTO.S432496&partnerID=40&md5=b79ab96985a2dbd4f175e9f26139eb9c

Myopia control lenses have been shown to modify visual function; however, it is arguable if these changes are short-term or long-term. We investigated the changes in accommodative behaviour and binocular vision functions of Malay myopic children who participated in a myopia control trial utilising spectacle lenses (n = 40). This article presents baseline accommodation and binocular vision measurements. The mean (± SD) age, spherical equivalent measured by cycloplegic autorefraction, and axial length (AL) for the right eyes were 10.00 ± 1.47 years, −3.02 ± 1.20 D, and 24.42 ± 0.93 mm, respectively. All participants had good distance and near visual acuities with high-contrast charts (100%), which were significantly better than low-contrast charts (10%) (p < 0.001). The mean (± SD) accommodative lag at baseline was 1.14 ± 0.35 D, while monocular and binocular accommodative amplitudes were 15.35 ± 2.07 D and 16.82 ± 2.27 D, respectively. Malay schoolchildren in this study were more esophoric at near compared to distance, with an accommodative-convergence over accommodation (AC/A) ratio of 5.64 ± 0.66 ∆/D. A higher degree of myopia was found to be associated with a longer AL (r = −0.49, p < 0.05) and higher esophoria at near (r = −0.46, p < 0.05). These baseline measures are consistent with data from other studies showing that myopic children have a high accommodative lag, an elevated AC/A ratio, a longer AL, and are more esophoric at near. The measures reported herein will serve as a basis for examining changes that occur within 12 months of wearing myopia control spectacle lenses. © 2024 Norazman et al.