Year: 2025
Type: article
Abstract: Background: Portable sphero-cylinder refraction is useful for remote medical missions and self-checking. A novel, inexpensive, handheld optical scope with an internal vision chart and adjustable diopter lens, called the Moptim MRT-200, was therefore validated. Methods: Young, capable patients from a pediatric eye practice had dry refraction estimates with the Moptim MRT-200, Adaptica 2WIN photoscreener, and Monocular Retinomax compared with actual refined retinoscopy. Vector-converted sphero-cylinder refractions and the univariate ABCD Ellipsoid were used for comparison as well as monocular visual acuity. Results: 206 racially diverse, high-risk refractive patients with median “Ellipsoid-Gap” of 3.5 had high correlation spherical equivalent and similar ABCD Ellipsoid comparing Moptim MRT-200, 2WIN and Retinomax (Kruskal Wallis X 2 (5) = 4.2, p = 0.52) however the 61 patients with blur associated with Ellipsoid gap over 5.0 had better refractive accuracy with 2WIN and Retinomax than Moptim MRT-200 (p < 0.001). Visual acuity with Moptim MRT-200 had a weak correlation (ICC.41 AND.47) and a Bland-Altman mean difference of approximately 1 logMAR line less fine than the actual phoropter refraction. Conclusion: Precise sphero-cylinder estimation with the Moptim MRT-200 was too complex for lay screeners and many young patients, especially compared to 2WIN and Retinomax; however, rapid estimation of spherical refraction was feasible and valid. Keywords: portable refraction, visual acuity, self-diagnosis, refractive comparison
Source: Clinical ophthalmology
DOI: 10.2147/opth.s545397
Authors: Heidi Schumacher, Giancarlo Garaygay, Aana Ayagalria, Bryant Lauano, Denise Marshall, J Townley, Robert Arnold
Language: English
Subfield: Epidemiology
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $2,320
OpenAlex ID: W4413903440