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4. Photoablative effect
The photoablative effect, also known as ablative photodecomposition, is based on the use of photons with an energy higher than the binding energy of biological molecules. The photoablative process thus consists in dissociating or breaking up matter and expelling fragments at supersonic speed. Photons with energies of the order of 3 to 5 eV are capable of dissociating peptide bonds or the carbon-carbon bonds of poplypeptide chains. This is why UV-emitting lasers such as excimer lasers (ArF: 193 nm-6.4 eV or XeCL: 308 nm-4 eV) or a frequency-quadrupled Nd:YAG laser (266 nm-4.7 eV) are well suited to photoablation.
This effect is particularly used in ophthalmology for refractive surgery on the cornea, where it is possible to correct myopia, mild to moderate astigmatism and small hyperopia. The LASIK (Laser Assisted In-situ Keratomileusis) technique has gradually replaced...
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Photoablative effect
Thermal effect
Bibliography
Websites
Société Francophone des Lasers Médicaux http://www.sflm.org
American Society for Laser Medicine & Surgery, Inc.
Laser Group of the French Society of Dermatology
European Laser Association
International Photodynamic Association
European...
Events
ASLMS Annual Meeting, USA
SFLM Annual Congress, France
Risks and prevention :
Regulations
Medical lasers are approved in accordance with MDD 93-42. http://www.ec.europa.eu/enterprise/policies/european-standards/harmonised-standards/medical-devices/index_en.htm
In France
Statistical and economic data
Each year, Laser Focus World magazine publishes a study on the laser market, and the medical laser market in particular (table 1 and figure
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