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17 Jun 2002
Some human cells thrive better when they receive low doses of coherentlight, according to findings from the US Air Force Academy. The resultssuggest that molecular biology can offer safety researchers a geneticmethod to add to the three most common ways of measuring the effects oflaser radiation on the eye.
Physicists look at ablation (removal of tissue), photochemistry (changesto biochemistry) and thermal effects when assessing laser damage.
"I'm not concerned with cells that have been ablated," John Obringertold ILSC 99. "There are considerations for cells on the edge of lesionswhich have suffered sub-threshold damage."
His group researched the effects of laser light on liver cells taggedwith marker genes. The research concluded:
1 Cells not previouslyknown to respond to light stimulation do react to laser beams.
2Human cells of all types respond at the genetic and protein level tolaser light.
3 Multiple laser parameters cause of the response.
4 So-called genetic profiling is a direct way to measure the effect oflaser light on living tissue.
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