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Near infrared radiation damage mechanism in the lens
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Ophthalmology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Ophthalmology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Ophthalmology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Ophthalmology.
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2015 (English)In: OPHTHALMIC TECHNOLOGIES XXV / [ed] Fabrice Manns, Per G. Söderberg, Arthur Ho, 2015, Vol. 9307, 930717Conference paper, Published paper (Refereed)
Abstract [en]

The current data strongly indicates that there is no photochemical effect of in vivo exposure to 1090 nm near IRR radiation within the pupil. Four groups of 20 Sprague-Dawley rats were unilaterally exposed in vivo to 96 W.cm(-2) centered inside the pupil for 10, 18, 33 and 60 min, respectively depending on group belonging. This resulted in radiant exposure doses of 57, 103, 198 and 344 kJ.cm(-2). Temperature evolution at the limbus during the exposure and difference of intensity of forward light scattering between the exposed and the contralateral not exposed eye was measured at 1 week after exposure. The temperature at the limbus was found to increase exponentially towards an asymptote with an asymptote temperature of around 7 degrees C and a time constant (1/k) of around 15 s. No increase of light scattering was found despite that the cumulated radiant exposure dose was [80; 250] times the threshold for photochemically induced cataract suggested by previous empirical data. It is concluded that at 1090 nm near IRR there is no photochemical effect.

Place, publisher, year, edition, pages
2015. Vol. 9307, 930717
Series
Proceedings of SPIE, ISSN 0277-786X ; 9307
Keyword [en]
near infrared radiation, cataract, in vivo, photochemical, thermal
National Category
Ophthalmology
Identifiers
URN: urn:nbn:se:uu:diva-257175DOI: 10.1117/12.2086661ISI: 000353411700020ISBN: 978-1-62841-397-7 (print)OAI: oai:DiVA.org:uu-257175DiVA: diva2:838507
Conference
25th Conference on Ophthalmic Technologies held as a part of the SPIE Photonics West BiOS Meeting, FEB 07-08, 2015, San Francisco, CA
Available from: 2015-06-30 Created: 2015-06-30 Last updated: 2017-01-25Bibliographically approved

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Söderberg, Per G.Talebizadeh, NooshinGalichanin, KonstantinKronschläger, MartinYu, Zhaohua

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