"optic disc" の定義と意味

What is "optic disc"?

The optic disc, also known as the optic nerve head, is a vital structure located at the back of the eye where the optic nerve connects to the retina. It appears as a circular or oval-shaped area that is paler in color compared to the surrounding retina. The optic disc plays a crucial role in vision as it serves as the entry point for nerve fibers that carry visual signals from the retina to the brain. Additionally, it lacks photoreceptor cells, making it a blind spot in our visual field. Through careful examination of the optic disc, healthcare professionals can assess the health of the optic nerve and detect any abnormalities or signs of eye conditions such as glaucoma.