A new low-cost, compact, auto-phoropter for refractive assessment in developing countries

A new low-cost, compact, auto-phoropter for refractive assessment in developing countries

Abstract Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system is based on three tunable-focus flui...

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Autores principales: Babak Amirsolaimani, Gholam Peyman, Jim Schwiegerling, Arkady Bablumyan, N. Peyghambarian
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
Materias:
Medicine
R
Science
Q
Acceso en línea:https://doaj.org/article/62a0a32a8c3940b39ff3ba86529408b4
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spelling oai:doaj.org-article:62a0a32a8c3940b39ff3ba86529408b42021-12-02T15:06:05ZA new low-cost, compact, auto-phoropter for refractive assessment in developing countries10.1038/s41598-017-14507-52045-2322https://doaj.org/article/62a0a32a8c3940b39ff3ba86529408b42017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-14507-5https://doaj.org/toc/2045-2322Abstract Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system is based on three tunable-focus fluidic lenses and thin-film holographic optical elements to perform automatic refractive error measurement and provide a diagnostic prescription without supervision. Three separate lenses are deployed to correct the defocus and astigmatism. The refractive error is measured using a Shack-Hartmann wavefront sensor that calculates the Zernike values of an infrared wavefront emerging from the eye. Holographic optical elements steer the emerging wavefront into the wavefront sensor, while simultaneously providing an unobstructed view for the subject. The power of each lens is controlled by pumping a liquid in and out of the lens chamber using servo motor actuated diaphragm pumps. Spherical and cylindrical correction range of −10 to +10 diopters with 0.1 diopter increments is achieved in less than 15 seconds using wavefront sensor feedback to the pumps. This system can be used in rapid screening of large patient populations especially in the developing countries that lack sufficient facilities and specialist doctors.Babak AmirsolaimaniGholam PeymanJim SchwiegerlingArkady BablumyanN. PeyghambarianNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Babak Amirsolaimani
Gholam Peyman
Jim Schwiegerling
Arkady Bablumyan
N. Peyghambarian
A new low-cost, compact, auto-phoropter for refractive assessment in developing countries
description Abstract Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system is based on three tunable-focus fluidic lenses and thin-film holographic optical elements to perform automatic refractive error measurement and provide a diagnostic prescription without supervision. Three separate lenses are deployed to correct the defocus and astigmatism. The refractive error is measured using a Shack-Hartmann wavefront sensor that calculates the Zernike values of an infrared wavefront emerging from the eye. Holographic optical elements steer the emerging wavefront into the wavefront sensor, while simultaneously providing an unobstructed view for the subject. The power of each lens is controlled by pumping a liquid in and out of the lens chamber using servo motor actuated diaphragm pumps. Spherical and cylindrical correction range of −10 to +10 diopters with 0.1 diopter increments is achieved in less than 15 seconds using wavefront sensor feedback to the pumps. This system can be used in rapid screening of large patient populations especially in the developing countries that lack sufficient facilities and specialist doctors.
format article
author Babak Amirsolaimani
Gholam Peyman
Jim Schwiegerling
Arkady Bablumyan
N. Peyghambarian
author_facet Babak Amirsolaimani
Gholam Peyman
Jim Schwiegerling
Arkady Bablumyan
N. Peyghambarian
author_sort Babak Amirsolaimani
title A new low-cost, compact, auto-phoropter for refractive assessment in developing countries
title_short A new low-cost, compact, auto-phoropter for refractive assessment in developing countries
title_full A new low-cost, compact, auto-phoropter for refractive assessment in developing countries
title_fullStr A new low-cost, compact, auto-phoropter for refractive assessment in developing countries
title_full_unstemmed A new low-cost, compact, auto-phoropter for refractive assessment in developing countries
title_sort new low-cost, compact, auto-phoropter for refractive assessment in developing countries
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/62a0a32a8c3940b39ff3ba86529408b4
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