This laser is a type of ultraviolet laser often used in UV photolithography in eye surgery.
The term excimer comes from excited dimer English (excited dimer)
This uses a combination of inert gas such as argon, krypton or xenon, with reactive gas. Under appropriate conditions of electrical stimulation, a pseudo-molecule is formed, which exists only in an excited state and can cause laser light in the ultraviolet range.
The excimer laser removes tissue with an accuracy of 0.25 microns. Currently in the second decade of use, the technologically sophisticated Excimer Laser has added a tremendous range of precision, control and security for the correction of vision errors. Using this remarkable technology, the cornea is reshaped to suit the requirements of your glasses or lenses, while reducing or eliminating dependence on corrective lenses for life.
Ultraviolet light from the excimer laser is absorbed well into tissues and organic compounds. Instead of cutting or burning, the excimer laser has enough energy to separate the bonds between molecules of the tissues. The excimer laser has the ability to lift or remove small and thin layers of cells without damaging tissue. is rare because most of excimer lasers (like this) are of noble gas halides.
and is complicated by the action of laser excimer molecule is because it has an associated state excited but also has a non-associative.
this is because the noble gases like xenon and krypton are inert and do not tend to form chemical compounds. However, in an excited state molecules can be temporarily linked with themselves (dimers) or halogen atoms such as fluorine and chlorine (forming complexes excited). I hope this serves as an answer.