Lumigan ophthalmic solution contains the active ingredient bimatoprost and is used to reduce elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension. It works by regulating fluid flow within the eye to maintain normal pressure. Common side effects include eye itching, redness of the eye, and skin pigmentation changes. It should be used with caution during pregnancy and as directed by only applying one drop per eye once daily in the evening.