<unk> :YAG (neodymium-doped yttrium aluminium garnet;<unk> :Y3Al5O12) is a crystal that is used as a lasing medium for solid-state lasers. The dopant, triply ionized neodymium,  typically replaces yttrium in the crystal structure of the yttrium aluminium garnet, since they are of similar size. Generally the crystalline host is doped with around 1% neodymium by weight.
Laser operation of<unk> :YAG was first demonstrated by Geusic et al. at Bell Laboratories in 1964.
Nd:YAG laser
Chemical oxygen iodine laser
LASIK
Keratoprosthesis
Corneal ulcer surgery
Photorefractive keratectomy
Corneal transplantation
Pseudoxanthoma elasticum surgery