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An automatic holographic adaptive phoropter

Phoropters are the most common instrument used to detect refractive errors. During a refractive exam, lenses are flipped in front of the patient who looks at the eye chart and tries to read the symbols. The procedure is fully dependent on the cooperation of the patient to read the eye chart, provides only a subjective measurement of visual acuity, and can at best provide a rough estimate of the patient's vision. Phoropters are difficult to use for mass screenings requiring a skilled examiner, and it is hard to screen young children and the elderly etc. We have developed a simplified, lightweight automatic phoropter that can measure the optical error of the eye objectively without requiring the patient's input. The automatic holographic adaptive phoropter is based on a Shack-Hartmann wave front sensor and three computer-controlled fluidic lenses. The fluidic lens system is designed to be able to provide power and astigmatic corrections over a large range of corrections without the need for verbal feedback from the patient in less than 20 seconds.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/627074
Date29 August 2017
CreatorsPeyman, Gholam A., Schwiegerling, Jim, Amirsolaimani, Babak, Bablumyan, Arkady, Savidis, Nickolaos, Peyghambarian, Nasser N.
ContributorsUniv Arizona, Coll Opt Sci
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Source SetsUniversity of Arizona
LanguageEnglish
Detected LanguageEnglish
TypeArticle
Rights© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).
Relationhttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/10352/2276807/An-automatic-holographic-adaptive-phoropter/10.1117/12.2276807.full

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