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Old 14th Jan 2012, 09:33
  #593 (permalink)  
lasernigel

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Join Date: Apr 2004
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Optical Density needs to be near zero at all other wavelengths if it is not to adversely affect your colour vision.
Having worked on lasers since 1978, unfortunately one of the considerations of wearing laser glasses/googles, is that it does reduce visible light transmission by up to 50%. There are some very good "high vis" filters around but the cost would no doubt be prohibitive. We use these filters within the optics of a slit lamp/microscope for the doctor to see the "target area" more clearly. But these are relatively quite small in diameter, approx 1-1.5cm.
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