49 y/o M with hx of HTN, HLD, IDDM presents with non-traumatic L-sided painless visual loss. The patient states that several hours prior to presentation he developed blurry vision in his L eye. On quick examination, there are no signs of trauma. Visual acuity is 20/120 on the L and 20/40 on the R with normal intraocular pressures bilaterally. Pupils are briskly reactive without any photophobia or consensual photophobia. The lids, sclera, conjunctivae are grossly normal and there are no corneal defects with fluorescein staining. Coming out of the room, you are concerned about this sudden-onset blurry vision. You remember a short lecture on visual acuity changes that Dr. Schindlebeck begrudgingly gave you in between his posting about sweater vests on Pinterest. Your differential brings concerning diagnoses including central retinal arterial occlusion (CRAO), central retinal vein occlusion (CRVO), retinal detachment, as well as vitreous hemorrhage. Now, our patien