Cone
Cone: A type of specialized light-sensitive cell (photoreceptor) in the retina of the eye that provides color vision and sharp central vision.
By contrast, the rods are the retinal photoreceptors that provide side vision and the ability to see objects in dim light (night vision).
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Cone dystrophy: A disease of the cones, the specialized light-sensitive cells that act as photoreceptors in the retina of the eye, providing color vision and sharp central vision. The cone dystrophies are a form of genetic macular degeneration characterized by progressive deterioration of the cones that leads to the distinctive triad of photophobia, loss of […]
- Cone snail
Cone snail: A fishing-eating snail (Conidae) that inhabits tropical coral reefs and produces toxins that immobilize their prey. See also: Conotoxin.
- Conformal radiation therapy
Conformal radiation therapy: A procedure that uses computers to create a 3-dimensional picture of the tumor in order to target the tumor as accurately as possible and give it the highest possible dose of radiation while sparing normal tissue as much as possible. It is also known as 3-D or conformational radiation therapy. Conventional radiation […]
- Conformational radiation therapy
Conformational radiation therapy: A procedure that uses computers to create a 3-dimensional picture of the tumor in order to target the tumor as accurately as possible and give it the highest possible dose of radiation while sparing normal tissue as much as possible. It is also known as 3-D or conformal radiation therapy. Conventional radiation […]
- Congenital
Congenital: A condition that is present at birth, whether or not it is inherited.