Persistent Link:
http://hdl.handle.net/10150/297519
Title:
Retinal Photometer Final Design Review
Author:
Castro, Layne Arin
Issue Date:
2013
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The main objective of the retinal photometer is to detect visual changes in the retina before irreversible damage can occur. The handheld photometer is fitted with a small light source surrounded by a circular pattern of LEDs. The central LED is focused into the fovea of the retina by a single lens. The lens can adjust to account for various visual acuities. The momentary light pulse induces photobleaching, a harmless process of temporarily blinding the fovea similar to the temporary blindness of walking into the sun after being in a dark space. The photometer will then record the amount of time it takes for full eyesight regeneration on the onboard LCD screen using a timer, which is programmed and wired through a self-contained circuit. Recovery times, interpreted by a medical professional, are shorter in healthy eyes than in eyes with macular degeneration. If increased response times are observed, a different lens can be inserted to decrease the spot size of the LED to pinpoint the severely damaged areas of the macula. Additionally, the circular pattern of LEDs tests visual sensitivities of off-center vision. Diabetic retinopathy or macular edema is likely if the patient cannot detect the full arrangement of LEDs.
Type:
text; Electronic Thesis
Degree Name:
B.S.
Degree Level:
bachelors
Degree Program:
Honors College; Mechanical Engineering
Degree Grantor:
University of Arizona
Advisor:
Arabyan, Ara

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleRetinal Photometer Final Design Reviewen_US
dc.creatorCastro, Layne Arinen_US
dc.contributor.authorCastro, Layne Arinen_US
dc.date.issued2013-
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe main objective of the retinal photometer is to detect visual changes in the retina before irreversible damage can occur. The handheld photometer is fitted with a small light source surrounded by a circular pattern of LEDs. The central LED is focused into the fovea of the retina by a single lens. The lens can adjust to account for various visual acuities. The momentary light pulse induces photobleaching, a harmless process of temporarily blinding the fovea similar to the temporary blindness of walking into the sun after being in a dark space. The photometer will then record the amount of time it takes for full eyesight regeneration on the onboard LCD screen using a timer, which is programmed and wired through a self-contained circuit. Recovery times, interpreted by a medical professional, are shorter in healthy eyes than in eyes with macular degeneration. If increased response times are observed, a different lens can be inserted to decrease the spot size of the LED to pinpoint the severely damaged areas of the macula. Additionally, the circular pattern of LEDs tests visual sensitivities of off-center vision. Diabetic retinopathy or macular edema is likely if the patient cannot detect the full arrangement of LEDs.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
thesis.degree.nameB.S.en_US
thesis.degree.levelbachelorsen_US
thesis.degree.disciplineHonors Collegeen_US
thesis.degree.disciplineMechanical Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorArabyan, Ara-
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