Light Levels In Ophthalmic Diagnostic Instruments

Francois C. Delori; Oleg Pomerantzeff; Martin A. Mainster

doi:10.1117/12.958799

7 October 1980 Light Levels In Ophthalmic Diagnostic Instruments

Francois C. Delori, Oleg Pomerantzeff, Martin A. Mainster

Proceedings Volume 0229, Ocular Effects of Non-Ionizing Radiation; (1980) https://doi.org/10.1117/12.958799
Event: 1980 Technical Symposium East, 1980, Washington, D.C., United States

Abstract

Methods are presented for determining the retinal exposures produced by broad-band ophthalmic light sources and for comparing these results with safety standards developed for the safe use of lasers (ANSI, Z136.1). Measurements of exposures produced by fundus cameras and indirect ophthalmoscopes are compared with both Z136.1 maximum permissible exposure levels (MPE) and experimental retinal damage thresholds. It is found that while the retinal exposures used in fundus photography are below MPEs, the irradiances used in indirect ophthalmoscopy may actually equal or exceed current MPEs. Methods are suggested for reducing retinal irradiance while maintaining retinal image luminance, and emphasis is placed on the importance of both acquainting the users of ophthalmic devices with any potential retinal hazard and providing the users and designers of ophthalmic devices with realistic protection standards.

Citation Download Citation

Francois C. Delori, Oleg Pomerantzeff, and Martin A. Mainster "Light Levels In Ophthalmic Diagnostic Instruments", Proc. SPIE 0229, Ocular Effects of Non-Ionizing Radiation, (7 October 1980); https://doi.org/10.1117/12.958799

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