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Vision loss

Posted on 13. Apr, 2009 by admin in Opthamology

Here is a quick list of important differentials of vision loss tested on the boards:

Important “buzzwords” to look out for..

PAINFUL!!!!!!!!!!!!

1. Acute angle closure glaucoma:
   • Mid-dilated
   • Non-reactive
   • Increased intraocular pressure = Papilloedema
   • Hard pupil
2. Herpes simplex keratitis (dendritic ulcer):
   • Photophobia
   • Decreased vision
3. Herpes zoster ophthalmicus:
   • Burning around eye
4. Pseudotumor cerebri
   • Enlarged blind spot
   • Bilateral vision loss
   • Increased intraocular pressure = Papilloedema
   • Retro-orbital pain
   • Pain with eye movement

NOT PAINFUL…

1. Open angle glaucoma:
   • Gradual PERIPHERAL loss
   • Tunnel vision
   • Cupping of optic nerve
2. Macular degeneration:
   • Progressive bilateral CENTERAL loss
3. Central Retinal Artery occlusion (look at image below)
   • Pale optic disc
   • Cherry red fovea
4. Central Retinal Venous occlusion (look at image below)
   • Optic disc swelling
   • Tortuosity
   • Venous swelling
5. Cavernous sinus thrombosis
   • Early vision loss

Pictures to review:

-Admin

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Tags: Step 2, USMLE