Floaters in your vision are another symptom of CRVO. When retinal blood vessels are not working properly, the retina grows new, fragile vessels that can bleed into the vitreous, the fluid that fills the center of the eye. Blood in the vitreous clumps and is seen as tiny dark spots, or floaters, in the field of vision.

In severe cases of CRVO, the blocked vein may cause painful pressure in the eye.

Ischemic CRVO can also cause neovascular glaucoma. This type of glaucoma is caused when abnormal blood vessels begin to grow inside the eye, causing the pressure in the eye to rise. Neovascular glaucoma is a serious condition that can cause pain and lead to severe vision loss. It may take three months or longer after CRVO occurs for neovascular glaucoma to appear.

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