The optic disc or optic nerve head is the point of exit for ganglion cell axons leaving the eye.Because there are no rods or cones overlying the optic disc, it corresponds to a small blind spot in each eye.. The ganglion cell axons form the optic nerve after they leave the eye. The optic disc represents the beginning of the optic nerve and is the point where the axons of …

Apr 4, 2022 · Optic disc edema refers to the ophthalmoscopic swelling of the optic disc with a concurrent increase in fluid within or surrounding the axons. While unilateral disc edema is more common, bilateral disc edema can occur. Many terms have been used to describe optic disc edema including swollen optic disc, disc edema, papilledema, papillitis, choked disc, and …

In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc that encodes binary data in the form of pits and lands on a special material, often aluminum, on one of its flat surfaces. Its main uses are physical offline data distribution and long-term archival.Changes from pit to land or from land to pit correspond to a binary value of 1; …

Disc drusen are composed of small proteinaceous material that become calcified with advancing age. These deposits can be considered small tumors that develop within the optic nerve head, and may lead to an elevated disc (and therefore this condition is sometimes referred to as pseudopapilledema). They can be associated with retinitis pigmentosa, angioid …

Pseudopapilledema is defined as anomalous elevation of one or both optic discs without edema of the retinal nerve fiber layer[2]. Papilledema, on the other hand, is a swelling of the optic disc due to increased intracranial pressure. It is important to distinguish pseudopapilledema from true papilledema, which can be the first sign of disease process with the potential for vision loss ...

Dec 5, 2022 · The optic disc is an elevation on the medial aspect of the retina where the sensory fibers and retinal vessels pass through the eyeball.The nerve fibers are conveyed via the optic nerve (CN II) and they travel alongside the central retinal artery and vein.. The optic disc is oval-shaped and located exactly 3 mm nasaly (medially) to macula lutea. It has a slight central …

Jun 15, 2005 · A C/D ratio between 0.4 and 0.8 can characterize a patient with a normal optic disc (i.e., physiologic cupping), a glaucoma suspect or someone with early to moderate glaucoma (depending on the optic disc size); If the C/D ratio is 0.8 or greater, consider the individual's disc as glaucomatous unless proven otherwise.

Its diameter is smaller than the diameter of the optic nerve. In the old days, when a doctor looked at the nerve with a monocular magnification device, the nerve head looked like a cup on a saucer (or disc). This started a whole group of optic nerve descriptors (cup to disc ratio, cupping, cupped, etc.). HOW IS OPTIC NERVE DAMAGE DETECTED?

The meaning of OPTIC is of or relating to vision or the eye. How to use optic in a sentence.

Anatomy. The optic nerve is a cable connection that transmits images from the retina to the brain.It consists of over one million retinal ganglion cell axons.The optic nerve head, or optic disc is the anterior end of the nerve that is in the eye and hence is visible with an ophthalmoscope.It is located nasally and slightly inferior to the macula of the eye.