The correct answer is option 4: Eyes. Glaucoma is a disease that affects the eyes. It is a condition in which there is damage to the optic nerve, usually caused by increased pressure within the eye. This increased pressure is often due to a build-up of fluid called aqueous humor. If left untreated, glaucoma can lead to permanent vision loss and blindness. It is important to get regular eye exams, especially as you age, to catch and treat glaucoma early. Option 1, skin, and option 2, lungs, are not related to glaucoma. Option 3, liver, is also unrelated to the disease.