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Japan: Momentary exposure to Class 3B laser causes retinal injury

Note: The following abstract describes a retinal injury from momentary exposure to a Class 3B (between 5 and 500 milliwatts) green laser pointer. The paper itself is behind a paywall; the abstract is for those who may wish to buy the paper to obtain further details.

“In previously reported cases of retinal injury from red (He–Ne; 632 nm) laser pointers, the maximum output was 5 mW or lower (Class 3a), and gazing time was 10 s or longer. Higher-energy, green (532 nm) laser pointers are increasingly displacing red lasers and, here also, injuries have been reported. We report a case of retinal light damage caused, after a moment's gaze, by a high-output (Class 3b) green laser pointer unavailable to the general public in Japan that was brought from overseas.”

From “A case of retinal light damage by green laser pointer (Class 3b)”, Ueda, T., Kurihara, I. & Koide, R. Japanese Journal of Ophthalmology, July 2011, Vol. 55, Issue 4, pp 428-430, (2011) 55: 428. https://doi.org/10.1007/s10384-011-0031-5 First online July 1 2011.