The damage to the eye caused by light is mainly due to biological damage caused by temperature effects and photochemical reactions caused by the partial absorption of the light's energy by the eye -- that is, there will be damage when the energy reaches a certain amount. The predominant mode of damage depends on the wavelength of light and the exposed tissue. The harm of laser is mainly due to the tissue damage caused by high temperature caused by the absorption of light of different wavelengths by different parts, such as burns, perforations, and blood vessel ruptures.
The location of the eye injury is directly related to the wavelength of the laser radiation. Laser radiation entering the eye and its damage can be broadly classified into:
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