Japanese Journal of Ophthalmology

, Volume 55, Issue 4, pp 428–430 | Cite as

A case of retinal light damage by green laser pointer (Class 3b)

  • Toshihiko UedaEmail author
  • Izumi Kurihara
  • Ryohei Koide

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 [1, 2, 3]. Higher-energy, green (532 nm) laser pointers are increasingly displacing red lasers and, here also, injuries have been reported [4]. 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.

Case report

A classmate directed a laser pointer beam at the left eye of patient 13-year-old boy from a distance of 10 cm. The energy for laser oscillation was provided by two tandem 1.5 V dry cells. The laser beam output as measured by a power meter (Nova II; Ophir Optronics, Jerusalem, Israel) was 20 mW at the time of the accident. However, the laser beam output with fully charged batteries was 50 mW. The patient gazed at the laser pointer for approximately 1 s and then closed the...


Green laser pointer Light damage Retina 


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Copyright information

© Japanese Ophthalmological Society 2011

Authors and Affiliations

  1. 1.Department of Ophthalmology, School of MedicineShowa UniversityTokyoJapan
  2. 2.Fudomae Eye ClinicTokyoJapan

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