Work

Retinal safety of near infrared radiation in photovoltaic restoration of sight

Year: 2015

Type: article

Abstract: Photovoltaic restoration of sight requires intense near-infrared light to effectively stimulate retinal neurons. We assess the retinal safety of such radiation with and without the retinal implant. Retinal damage threshold was determined in pigmented rabbits exposed to 880nm laser radiation. The 50% probability (ED50) of retinal damage during 100s exposures with 1.2mm diameter beam occurred at 175mW, corresponding to a modeled temperature rise of 12.5°C. With the implant, the same temperature was reached at 78mW, close to the experimental ED50 of 71mW. In typical use conditions, the retinal temperature rise is not expected to exceed 0.43°C, well within the safety limits for chronic use.

Source: Biomedical Optics Express

DOI: 10.1364/boe.7.000013

Authors: H. Lorach, J. Wang, D. Y. Lee, R. Dalal, P. Huie, D. Palanker

Institutions: Stanford University, Gachon University Gil Medical Center

Language: English

Topic: Ocular and Laser Science Research

Subfield: Ophthalmology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $1,913