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Proceedings Paper

UVA system for human cornea irradiation
Author(s): Fernando Ramon Ayres Pereira; Mario Stefani; José Antonio Otoboni; Eduardo Henrique Richter; Giuliano Rossi; Alessandro Damiani Mota; Liliane Ventura
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Paper Abstract

According to recent studies, an increase in corneal stiffness is a promising alternative for avoiding ectasias and for stagnating keratoconus of grades 1 and 2. The clinical treatment consists essentially of instilling Riboflavin (vitamin B2), in the cornea and then irradiating the corneal tissue, with UVA (365nm) radiation at 3mW/cm2 for 30min. This procedure provides collagen cross-linking in the corneal surface, increasing its stiffness. This work presents a system for UVA irradiation of the corneas at a peak wavelength of 365nm with adjustable power up to 5mW. The system has closed loop electronics to control the emitted power with 20% precision from the sated power output. The system is a prototype for performing corneal cross-linking and has been clinically tested. The closed loop electronics is a differential from the equipments available on the market.

Paper Details

Date Published: 18 February 2009
PDF: 7 pages
Proc. SPIE 7163, Ophthalmic Technologies XIX, 71631L (18 February 2009); doi: 10.1117/12.806821
Show Author Affiliations
Fernando Ramon Ayres Pereira, Opto Eletrônica S.A. (Brazil)
Univ. de São Paulo (Brazil)
Mario Stefani, Opto Eletrônica S.A. (Brazil)
José Antonio Otoboni, Opto Eletrônica S.A. (Brazil)
Eduardo Henrique Richter, Opto Eletrônica S.A. (Brazil)
Giuliano Rossi, Opto Eletrônica S.A. (Brazil)
Alessandro Damiani Mota, Opto Eletrônica S.A. (Brazil)
Liliane Ventura, Univ. de São Paulo (Brazil)

Published in SPIE Proceedings Vol. 7163:
Ophthalmic Technologies XIX
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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