Optic disk
Optic Disk
The Optic Disk (pronounced: /ˈɒptɪk dɪsk/), also known as the Optic Nerve Head, is a crucial part of the human eye. It is the point of exit for ganglion cell axons leaving the eye.
Etymology
The term "Optic Disk" originates from the Greek word "optikos", meaning "of sight", and the Latin word "discus", meaning "disk".
Anatomy
The Optic Disk is located in the back of the eye. It is the point where the optic nerve leaves the eye, carrying information about light and images to the brain. The optic disk is also the entry point for the major blood vessels that supply the retina with nutrients and oxygen.
Function
The primary function of the Optic Disk is to transmit visual information from the retina to the brain via the optic nerve. This information is processed in the brain to produce the images we see.
Related Terms
- Optic Nerve: The nerve that transmits visual information from the retina to the brain.
- Retina: The light-sensitive layer of tissue at the back of the inner eye.
- Ganglion Cell: A type of neuron located near the inner surface of the retina.
Pathology
Damage to the Optic Disk can lead to vision loss or blindness. Conditions such as glaucoma and optic neuritis can cause damage to the optic disk.
External links
- Medical encyclopedia article on Optic disk
- Wikipedia's article - Optic disk
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