I agree with Nide.

There are autoimmune inflammatory problems that affect the eye this way. They can lead to damage of the retina, or detachment.

https://health.google.com/health/ref/Uveitis

My husband has a colleague at work who has this, and has to get steroid shots in her eye ( eeekkk...but she says it is not too bad really) to keep her inflammation down.)

Also anyone with eye symptoms should get a B12 test done.
Your report should show numbers at 400 or above. If it is lower, do not accept "normal" from your doctor, as the lab ranges are no longer accurate in US for this. Inflammation of the optic nerve may occur with low B12. This can become very damaging to vision so getting this test is important.

While you are getting this done, ask for Vit D. too. We are seeing many posters on all the boards here with low D.

This link has 2 medical videos on Vit D today:
http://neurotalk.psychcentral.com/thread92116.html