Retinal nerve fiber layer
Retinal Nerve Fiber Layer
The Retinal Nerve Fiber Layer (RNFL) is a layer of the retina in the human eye. It is composed of the axons of the retinal ganglion cells that collect visual information and transmit it to the brain.
Pronunciation
Retinal: /rɛˈtaɪnəl/ Nerve: /nɜːrv/ Fiber: /ˈfaɪbər/ Layer: /ˈleɪər/
Etymology
The term "retinal" is derived from the Latin word "retina", which means "net". "Nerve" comes from the Latin "nervus", meaning "sinew, tendon, nerve". "Fiber" is from the Latin "fibra", meaning "a fiber, filament". "Layer" is from the Old English "leger", meaning "bed, couch, grave".
Function
The RNFL is responsible for transmitting visual information from the photoreceptor cells in the retina to the brain via the optic nerve. It is a crucial component of the visual pathway and plays a significant role in our ability to see.
Related Terms
- Optic Disc: The area in the eye where the optic nerve enters the retina. It is often used as a reference point in the measurement of RNFL thickness.
- Glaucoma: A group of eye conditions that damage the optic nerve, often caused by abnormally high pressure in your eye. Damage to the RNFL is a key indicator of glaucoma.
- Optical Coherence Tomography (OCT): A non-invasive imaging test that uses light waves to take cross-section pictures of your retina, including the RNFL.
See Also
External links
- Medical encyclopedia article on Retinal nerve fiber layer
- Wikipedia's article - Retinal nerve fiber layer
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