That is a 365nm long wave uva bulb. There are studies that suggest long term exposure to 95 to 365 nm can cause photo-oxidation of human lens pigment problems, and cataracts. That is why good sunglasses block UVA and UVB.
http://www.iovs.org/content/16/10/932.full.pdf
I work with long and short wave UV exposure units and the data that came with it states the light blocking guards be in place and eye protection be worn at all time.
The risk is slight but it is there.
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