Cone cell
Cone cell
Cone cells, or cones, are one of the two types of photoreceptor cells that are in the retina of the eye which are responsible for color vision. They are also one of the three types of photoreceptor cells in the retina of the eye.
Pronunciation
/kəʊn sel/
Etymology
The term "cone cell" comes from the cone-like shape of the cell itself. The word "cone" is derived from the Greek word "kōnos", meaning "pine cone", and the word "cell" comes from the Latin "cella", meaning "small room".
Function
Cone cells are less sensitive to light than the rod cells in the retina and are more suited to daylight vision. They are also responsible for high spatial acuity, the ability to see fine detail, and color differentiation.
Types
There are three types of cone cells, each containing a different type of photopsin which are sensitive to different wavelengths of light. These are often referred to as short-wavelength (S), middle-wavelength (M), and long-wavelength (L) cone cells.
Related Terms
External links
- Medical encyclopedia article on Cone cell
- Wikipedia's article - Cone cell
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