Which of the following rays are used in doing LASIK (Laser - Assisted in Situ keratomileusis) eye surgery ?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Ultraviolet rays
LASIK eye surgery reshapes the cornea with a finely focused laser beam. Ultraviolet laser light (from an excimer laser, of wavelength about 193 nm) is used, because each UV photon carries enough energy to break the bonds of the corneal tissue and remove a very thin layer precisely, without heating the surrounding tissue.
NCERT (2026-27):
Ultraviolet Rays – “… Due to its shorter wavelengths, UV radiations can be focussed into very narrow beams for high precision applications such as LASIK (Laser-assisted in situ keratomileusis) eye surgery.”