Biological Effects
Lasers can interact with the tissues of the eye and skin in a number of negative ways. These interactions include:
Thermal
- Caused by elevated temperature after absorption of laser energy
- Nearly all wavelengths and exposure durations
Photochemical
- Caused by chemical reactions within body tissue after absorption of laser energy
- Only with wavelength less than 0.550 micrometers
- Dominant effect for exposure durations greater than 10 seconds
Shockwave (Acoustic)
- An explosive effect when short pulses are absorbed on the retina
- Pulse duration less than 10 microseconds
To learn more about LSO visit our Medical Laser Safety Officer Online Training web page.
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