Vision loss can be gradual or sudden, and symptoms may vary depending on the underlying cause and the individual's age. Here's how you can recognize the early and common signs of blindness.

[2] Without looking for other less obvious "clues" in the retina and choroid, the striking appearance of a bilateral swelling of the optic nerve heads can misdirect investigation toward less ...

This disease has no early symptoms, so regular eye examinations ... Optic nerve cupping—meaning the center portion of the optic nerve is enlarged—is a tell-tale sign of glaucoma.