The acronym LASIK stands for 'Laser-Assisted in Situ Keratomileusis' and is a type of vision correction surgery. It is a popular procedure that uses laser technology to reshape the cornea and improve vision. The procedure is relatively quick and painless, and can correct nearsightedness, farsightedness, and astigmatism. It is considered a safe and effective way to improve vision without the need for glasses or contact lenses.