or optic nerve head: Eyeball end of the optic nerve. Denotes the site of exit of retinal nerve fibers from the eye and entrance of blood vessels into the eye.
The area from where all of the neural fibers leave the eyeball.
the junction of all of the retinal nerve fibers at the beginning of the optic nerve. Appears as a grayish disc shape near the fovea in fundus photos.
The portion of the optic nerve also found on the retina of the eye. The optic disc identifies the start of the optic nerve where messages from cone and rod cells leave the eye via nerve fibers to the optic center of the brain. This area is also known as the "blind spot."
Portion of the optic nerve seen with an ophthalmoscope that is also called the optic nerve head.
exit point on the retina for nerve fibres passing to the brain
The head of the optic nerve that is formed by the meeting of all retinal nerve fibers.
The front surface of the optic nerve that can be seen inside the eye with special instruments.
The position in the back of the eye where the nerve (along with an artery and vein) enters the eye corresponds to the "blind spot" since there are no rods or cones in these location. Normally, a person does not notice this blind spot since rapid movements of the eye and processing in the brain compensate for this absent information. This is the area that the ophthalmologist studies when evaluating a patient for glaucoma, a condition where the optic nerve becomes damaged often due to high pressure within the eye. As it looks like a cup when viewed with an ophthalmoscope, it is sometimes referred to as the Optic Cup.
Exit point of the optic nerve from the eyeball. Also known as the physiological blind spot.
The circular area in the back of the inside of the eye where the optic nerve connects to the retina. Also called the optic nerve head. Contains no photoreceptors and therefore creates a blind spot in the visual field.
The area of the retina that the optic nerve leaves from; responsible for the blind spot
The optic disc or optic nerve head is the location where ganglion cell axons exit the eye to form the optic nerve. There are no light sensitive rods or cones to respond to a light stimulus at this point thus it is also known as "the blind spot" or "anatomical blind spot"; the break in the visual field created by the optic disc is also called "the blind spot" or "physiological blind spot". The optic nerve head in a normal human eye carries from 1 to 1.2 million neurons from the eye towards the brain.