06:10am Sunday 20 August 2017

Study suggests photochemical retinal exposure limits should differ during surgery

The study, being presented this week at the 2010 Annual Meeting of the Association for Research in Vision and Ophthalmology, reviewed known retinal injury thresholds from studies of mammalian retinae. Results showed that Type 1 and Type 2 photochemically induced retinal injury have been well reported. It was determined that exposure limits were not needed for Type 1, which is typically seen in animals exposed to fluorescent lamps for many hours. Type 2 results from focal exposures to short-wavelengths for fractions of an hour; however, the chromophore is still debated. According to the abstract, the luminous efficacy of radiation suggests the damage mechanism could be due to saturation of cone-opsin regeneration in the retinal pigment epithelium.

The evaluators concluded: “Although previously developed retinal exposure limits are still relevant for the awake, task-oriented eye, this is not the case for ophthalmic instrument exposure—particularly to the anesthetized eye during surgery.”

Abstract Title: Competing Photochemical Retinal Damage Mechanisms from Visible Light: Implications for Human Retinal Exposure Limits
Presentation Start/End Time: Tuesday, May 4, 2010, 5:15 – 5:30pm
Location: Room 305, Broward County Convention Center
Session Number: 365

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The Association for Research in Vision and Ophthalmology (ARVO) is the largest eye and vision research organization in the world. Members include more than 12,500 eye and vision researchers from over 80 countries. ARVO encourages and assists research, training, publication and knowledge-sharing in vision and ophthalmology. For more information, visit www.arvo.org

All abstracts accepted for presentation at the ARVO Annual Meeting represent previously unpublished data and conclusions. This research may be proprietary or may have been submitted for journal publication. Embargo policy: Journalists must seek approval from the presenter(s) before reporting data from paper or poster presentations. Press releases or stories on information presented at the ARVO Annual Meeting may not be released or published until the conclusion of the presentation.


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