Optic nerve head
The circular area in the back of the inside of the eye where the optic nerve connects to the retina.
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- Optic nerve pathways
The course of the chemical and electrical impulse from light stimulating the retina as it passes from the optic nerve to the vision center of the brain. The left and right branches of the optic nerves join behind the eyes, just in front of the pituitary gland, to form a cross-shaped structure called the optic […]
- Optic neuroma
A rare benign tumor of the optic nerve.
- Optician
A specialist in fitting eyeglasses and making lenses to correct vision problems. An optometrist performs eye examinations and writes prescriptions for corrective lenses; an optician fills that prescription.
- Optometrist
A practitioner who provides primary eye and vision care, performs eye examinations to detect vision problems, and prescribes corrective lenses to correct those problems. Some optometrists also make and fit eyeglasses, but many leave that job to opticians. An optometrist is a doctor of optometry (OD), not an MD. When an optometrist detects eye disease, […]
- OPV
Oral polio vaccine. See Polio vaccine, oral.