A 64-year-old man presents to the ophthalmology clinic for a routine eye examination. He reports no significant vision problems but mentions that his vision has slowly become less sharp over the past few years. He denies any sudden visual loss, eye pain, redness, or halos around lights. He wears reading glasses but has not updated his prescription in a few years. There is no history of trauma or surgery to the eyes. He has a family history of glaucoma (his father) and hypertension, for which he takes medication. He does not smoke or drink alcohol and has no other known medical conditions.