Optic disc
Optic Disc
The Optic Disc (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 Disc" originates from the Greek word "optikos" meaning "of sight" and the Latin word "discus" which refers to a circular object.
Anatomy
The Optic Disc is situated at the back of the eye, in the Retina. It is the point where the Optic Nerve connects to the retina. The optic disc is a vertically oval area of about 1.5 mm in diameter. It is not sensitive to light, hence also known as the Blind Spot.
Function
The primary function of the Optic Disc is to transmit visual information, captured by the retina, to the brain via the optic nerve.
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.
- Blind Spot: The point of entry of the optic nerve on the retina, insensitive to light.
Pathology
Any damage to the optic disc can lead to vision problems. Conditions such as Glaucoma and Optic Neuritis can cause swelling of the optic disc, a condition known as Papilledema.
See Also
External links
- Medical encyclopedia article on Optic disc
- Wikipedia's article - Optic disc
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