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18 February 2009 UVA system for human cornea irradiation
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Proceedings Volume 7163, Ophthalmic Technologies XIX; 71631L (2009)
Event: SPIE BiOS, 2009, San Jose, California, United States
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.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fernando Ramon Ayres Pereira, Mario Stefani, José Antonio Otoboni, Eduardo Henrique Richter, Giuliano Rossi, Alessandro Damiani Mota, and Liliane Ventura "UVA system for human cornea irradiation", Proc. SPIE 7163, Ophthalmic Technologies XIX, 71631L (18 February 2009);

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