Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.3390/s23010362
Аннотация: <jats:p>Autorefraction is an objective way to determine the refractive error of the eye, without the need for feedback by the patient or a well-educated practitioner. To make refractive measurements more accessible in the background of the growing prevalence of myopia, a compact autorefractor was built, containing only few optical Показать полностьюcomponents and relying on double-pass imaging and the physical properties of the point-spread function and digital image processing instead. A method was developed to analyze spherical defocus as well as the defocus and angle of astigmatism. The device was tested using calibrator eye models in a range of ± 15 D spherical defocus and −3 D astigmatic defocus. Reliable results could be achieved across the whole measurement range, with only a small increase in deviation toward high values of refractive errors, showing the feasibility of a PSF-based approach for a compact and low-cost solution for objective measurements of refractive error.</jats:p>
Журнал: Sensors
Выпуск журнала: Т. 23, № 1
Номера страниц: 362
ISSN журнала: 14248220
Издатель: Molecular Diversity Preservation International