http://www.osnsupersite.com/
OCULAR SURGERY NEWS 3/1/2006
Researchers analyze femtosecond laser bubble morphology
The size and shape of femtosecond laser bubbles do not correlate with the energy applied, a study in eye bank eyes found.
Jared Schultz
Excerpt:
?Probably you can work with energy levels much lower than you do currently, because the levels we are using right now just cause punctual disruption of the stroma, with tissue bridges remaining in between,? he told Ocular Surgery News in an interview. ?To open the dissection line, we still need to tear apart these structures.?
He said the researchers did an experimental series using power as high as 15 ?J, which created larger disruption bubbles but still did not yield a clear dissection line.
?You don?t gain better results by just going to a higher energy,? he said.
Dr. Vossmerbaeumer said that one shortcoming of the study was that it is difficult to measure the actual energy output of the laser source.
?On a research basis, it will be perhaps a question to know whether the machine really emits a 4 ?J pulse. It might be that one is a 3 ?J pulse and one is 5 ?J,? he said in the interview. ?The femtosecond laser pulses are known not to be perfectly stable, so they oscillate in the energy they emit. That?s important to keep in mind when looking at all these results.?
