What is the main function of the retinal nerve fiber layer?

What is the main function of the retinal nerve fiber layer?

• A. To absorb light.
• B. To regenerate photoreceptors.
• C. To transmit visual information from the retina to the brain.
• D. To regulate intraocular pressure.

Answer: (C)

The retinal nerve fiber layer mainly serves to carry visual information from the retina to the brain. It is made up of the unmyelinated axons of retinal ganglion cells, which bundle together to form the optic nerve. After photoreceptors detect light, signals pass through the retinal circuitry and then travel along these axons toward higher visual centers in the brain. This transmission is what the RNFL does, not light absorption, photoreceptor regeneration, or regulation of eye pressure. Clinically, measuring RNFL thickness with OCT helps detect loss of these axons in conditions like glaucoma, since thinning indicates fewer nerve fibers.

The retinal nerve fiber layer mainly serves to carry visual information from the retina to the brain. It is made up of the unmyelinated axons of retinal ganglion cells, which bundle together to form the optic nerve. After photoreceptors detect light, signals pass through the retinal circuitry and then travel along these axons toward higher visual centers in the brain. This transmission is what the RNFL does, not light absorption, photoreceptor regeneration, or regulation of eye pressure. Clinically, measuring RNFL thickness with OCT helps detect loss of these axons in conditions like glaucoma, since thinning indicates fewer nerve fibers.