Xalatan eye drops, containing latanoprost, are used to reduce pressure inside the eye, a condition known as ocular hypertension, or glaucoma, which can lead to vision loss. They work by helping fluid drain from the eye, thus lowering the pressure. This helps prevent further damage to the optic nerve and potential blindness. Xalatan can be used alone or with other eye drops, and it's important to use it as directed by a doctor.