Peripheral vision is what you see beyond your direct line of sight. It helps provide a complete sense of your surroundings without moving your head. Jump to Key Takeaways. Within the eye, rods and ...

A glaucoma test is a complete eye exam that checks vision, eye health, and optic nerve health. Glaucoma is an eye disease that damages the optic nerve. A complete eye exam can diagnose this condition.

Hemianopia is a loss of half a person’s peripheral vision. This means a person loses the right half or left half of vision in each eye. Hemianopia can occur from injury to the brain, such as a stroke.