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Hur påverkar färgade kontaktlinser färgseendet?
Linnaeus University, Faculty of Health and Life Sciences, Department of Medicine and Optometry.
2017 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Syftet: Syftet med studien var att undersöka hur färgade kontaktlinser påverkade färgseendet och vilka våglängder av det synliga ljuset som de släppte igenom.

Metod: 30 personer i åldrarna 19-52 deltog i studien. De hade sfärstyrkor mellan +5,00 D till -10,00 D och ingen hade cylinderstyrkor över -0,75 D. En synundersökning gjordes för att få fram nuvarande styrkor och sattes i en provbåge, ögat som inte undersöktes ockluderades. Ett Farnsworth D-15 färgsorteringstest användes för att bedöma färgseendet utan och med tre plana kontaktlinser i färgerna Blue, Green och Sherry från Star-Lens AB. Med en spektrofotometer mättes vilka våglängder som passerade genom kontaktlinserna.

Resultat: Det fanns en signifikant skillnad med kontaktlinsen Blue på färgseendet av medelvärdet på antal gjorda fel (p < 0,05) jämfört med utan kontaktlins. Med Green och Sherry fanns det inte någon signifikant skillnad (p > 0,05 för båda). Transmittansen genom kontaktlinsen Blue hade ett minimum vid 590 nm, Green vid 600 nm och Sherry vid både 510 nm och 540 nm. Green och Sherry sjönk även transmittansen kraftigt efter 530 nm respektive 480 nm.

Slutsats: Det blev en signifikant skillnad på färgseendet med kontaktlinsen Blue, men ingen skillnad med Green och Sherry. Färgade kontaktlinser har ingen direkt påverkan på färgseendet vid mätning med ett Farnsworth D-15 färgsorteringstest. Transmittansen på kontaktlinserna sjönk mest vid respektive kontaktlins komplementärfärg, men färgerna Green och Sherry sjönk transmittansen även en del i de blåa våglängderna.

Abstract [en]

The aim of this study was to examine how tinted contact lenses affect color vision and which wavelengths of the visible light that is transmitted through them.

 

A total of 30 people in the range from 19 to 52 years were included in this study. They had refractive errors from about +5.00 D to -10.00 D and no cylinder power over

-0.75 D. An eye exam was made and their current power was put in a trial frame, the eye that was not examined was occluded. A Farnsworth D-15 color arrangement test was made to examine color vision without tinted contact lenses and was then repeated with each of the three plano contact lenses in the colors Blue, Green and Sherry. A Spectrophotometer was used to measure the transmittance of visible light through the contact lenses.

 

There was a significant difference with the Blue contact lens on the mean error score (p < 0.05) compared to without contact lens. With the contact lenses Green and Sherry was there no significant difference (p > 0.05 for both). The transmittance through the Blue contact lens had a minimum at 590 nm, Green at 600 nm and Red at both 510 nm and 540 nm. Both the Green and Red contact lenses the transmittance decreased considerably after 530 nm and 480 nm respectively.

 

There was a significant difference in color vision with the Blue contact lens, but no difference with the Green and Red contact lenses. Tinted contact lenses have no direct effect on color vision when measuring with a Farnsworth D-15 color arrangement test. The transmittance decreased most at the complementary color of each contact lens, but with the Green and Red contact lenses the transmittance also decreased in the blue range of the visible wavelengths.

Place, publisher, year, edition, pages
2017. , p. 22
Keywords [sv]
Färgseendet, Farnsworth D-15, Färgade kontaktlinser, Transmittans
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-65519OAI: oai:DiVA.org:lnu-65519DiVA, id: diva2:1111333
Subject / course
Optometry
Educational program
Optometry Programme, 180 credits
Supervisors
Examiners
Available from: 2017-06-29 Created: 2017-06-18 Last updated: 2017-06-29Bibliographically approved

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