What can cause the blurriness in glaucoma?

Vision loss: Blurriness can also be caused by extremely high eye pressure and corneal edema, inflammation, side effects from medications or surgery. If your vision has become blurry you should definitely consult with your eye physician asap. It may be reversible.

Damage of the nerve: Loss of ganglion cells is typically the primary cause since eventually the information is not sent back to the brain as the retinal nerve fiber layer degenerates, but also there is degeneration within the brain as well can present as contrast sensitivity problem at first.