A 54-year-old woman presents to emergency for a 2-hour history of painless loss of vision in her left eye following bumping into the corner of a cabinet. Examination shows visual acuity of 20/300 in the left eye and 20/30 in the right eye. She has history of hypertension and diabetes. Which of the following is the most likely diagnosis?
Central retinal artery occlusion
Central retinal vein occlusion
Hypertensive retinopathy
Retinal malposition
Vitreous tear