Measuring visual acuity and spherical refraction with smartphone screens emitting blue light
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Rosa María Salmerón-Campillo [1] ; Félix Tomás Varona-Gómez [1] ; Mari Ogino [2] ; Stephen Hunter [3] ; Vincent Hussey [4] ; Donny W. Suh [4] ; Rujuta Gore [4] ; Mateusz Jaskulski [1] [5] ; Norberto López-Gil [1] [1]
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[1] Universidad de Murcia
Universidad de Murcia
Murcia, España
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[2] Creighton University
Creighton University
City of Omaha, Estados Unidos
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[3] University of California, Riverside
University of California, Riverside
Estados Unidos
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[4] University of California, Irvine
University of California, Irvine
Estados Unidos
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[5] Indiana University Bloomington
Indiana University Bloomington
Township of Bloomington, Estados Unidos
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- Localización: Journal of Optometry: peer-reviewed Journal of the Spanish General Council of Optometry, ISSN-e 1888-4296, Vol. 17, Nº. 1, 2024
- Idioma: inglés
- Enlaces
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Resumen
Introduction A periodical self-monitoring of spherical refraction using smartphones may potentially allow a quicker intervention by eye care professionals to reduce myopia progression. Unfortunately, at low levels of myopia, the far point (FP) can be located far away from the eye which can make interactions with the device difficult. To partially remedy this issue, a novel method is proposed and tested wherein the longitudinal chromatic aberration (LCA) of blue light is leveraged to optically bring the FP closer to the eye.
Methods Firstly, LCA was obtained by measuring spherical refraction subjectively using blue pixels in stimuli shown on organic light-emitting diode (OLED) screens and also grey stimuli with matching luminance. Secondly, the visual acuity (VA) measured with a smartphone located at 1.0 m and 1.5 m and displaying blue optotypes was compared with that obtained clinically standard measurements. Finally, the spherical over refraction obtained in blue light with a smartphone was compared with clinical over-refraction with black and white (B&W) optotypes placed at 6 m.
Results Mean LCA of blue OLED smartphone screens was −0.67 ± 0.11 D. No significant differences (p > 0.05) were found between the VA measured with blue optotypes on a smartphone screen and an eye chart. Mean difference between spherical over-refraction measured subjectively by experienced subjects with smartphones and the one obtained clinically was 0.08 ± 0.34 D.
Conclusions Smartphones using blue light can be used as a tool to detect changes in visual acuity and spherical refraction and facilitate monitoring of myopia progression.
