This study aimed to pilot whether axial length reduces when being treated with myopia control glasses in mesopic conditions. Participants were required to have single-vision glasses with spherical equivalent between -1.00 and -5.00 dioptres, astigmatism less than -1.00 dioptre, a normal eye examination and be aged between 15–25 years old. A pair of myopia control glasses were provided to all participants. All assessments were conducted at 9am after an advised eight hours sleep and light breakfast. Initially, participants’ dark adapted for 10 minutes followed by baseline axial length measurements. Participants were asked to read an eBook on a computer in a dark room for 20 minutes with usual glasses followed by axial length measurements. The text was black on a white background, size equivalent to 6/60 near visual acuity. The procedure was repeated using myopia control glasses. A total of 11 participants were recruited; 90.9% were male with a mean age of 20.9 years and mean spherical equivalent of -3.20 dioptres. Axial length increased to a mean of 8.2µm after reading with usual glasses. No change was seen when reading with myopia control glasses vs baseline measurements. The authors acknowledge the following limitations of the study: no emmetropic control group was recruited and data on participant habitual light exposure was not collected. Further research is required to compare effects with emmetropic participants and using both mesopic and scotopic conditions.
Piloting myopic control glasses effects on axial length under mesopic conditions
Reviewed by Lauren Hepworth
A pilot study of axial length changes associated with myopia control spectacles in subjects reading under mesopic conditions.
CONTRIBUTOR
Lauren R Hepworth
University of Liverpool; Honorary Stroke Specialist Clinical Orthoptist, Northern Care Alliance NHS Foundation Trust; St Helen’s and Knowsley NHS Foundation Trust, UK.
View Full Profile
