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Dr. James
Dr. James, Board Certified Ophthalmologist
Category: Eye
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Experience:  Eye Physician and Surgeon
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I suddenly started seeing a prism like light around the outside

Resolved Question:

I suddenly started seeing a prism like light around the outside of what I was looking at. I could see straight ahead, but the prism was in my perifical vision. I closed each eye and could see the prism light with both eyes. I do have early stages of Fuch's, does this have anythng to do with that?
Submitted: 6 years ago.
Category: Eye
Expert:  Dr. James replied 6 years ago.
You are likely experiencing a PVD or posterior vitreous detachment, a common event that happens in many people.

You have a thick gel material in the middle of your eyes. Over time as it liquefies, this gel material collapses on itself and pulls away from the wall of the eye. In the process it can stimulate the retina -- causing the flashes or prism effect that you see.

It is recommended that you see your ophthalmologist to look at the retina to make sure there are no problems such as a retinal hole or tear. In most cases, there are no problems, but this exam in precautionary and allows for preventative treatment of any lesions that are found.

If you notice a sudden increase in floaters, flashes of light (like a lightening storm), or a shadow/veil in the periphery of your vision, this can be worrisome for a retinal detachment. You would need to contact your ophthalmologist promptly in that case.

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