There are numerous applications for ND:YAG lasers in ophthalmology. These include treating posterior capsular opacification after cataract surgery, creating a peripheral iridotomy in patients with narrow angles or angle-closure glaucoma. Ophthalmic YAG lasers may also be used for cutting the anterior capsule for capsular block syndrome and capsular phimosis, as well as cutting vitreous strands in the anterior chamber.