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- blind spot, small portion of the visual field of each eye that corresponds to the position of the optic disk (also known as the optic nerve head) within the retina. There are no photoreceptors (i.e., rods or cones) in the optic disk, and, therefore, there is no image detection in this area.
www.britannica.com/science/blind-spot
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A blind spot, scotoma, is an obscuration of the visual field. A particular blind spot known as the physiological blind spot, "blind point", or punctum caecum in medical literature, is the place in the visual field that corresponds to the lack of light-detecting photoreceptor cells on the optic disc of the retina where the optic nerve passes ...
May 27, 2021 · Every human eye has something called a blind spot. This natural blind spot is the place in the retina — the light-sensitive inner lining at the back of your eye — that doesn’t have any cells that respond to light. The blind spot sits in the part of your retina where the optic nerve exits the eye.
- Common Causes of Central Scotomas
- Common Causes of Junctional Scotomas
- Common Causes of Paracentral Scotomas
- Common Causes of Scintillating Scotomas
Central scotoma causes include: 1. Macular degeneration. 2. Strokes. 3. Tumors. 4. Scars from eye injuries. 5. Traumatic brain injury.
Junctional scotoma causes include: 1. Tumors of the pituitary gland. 2. Other types of cancers, such as craniopharyngioma. 3. Aneurysms, or bulges, in your arteries. 4. Infections, likesyphilis and tuberculosis. 5. Demyelinating conditions like multiple sclerosis.
Paracentral scotoma causes include: 1. Glaucoma (which can cause an arcuate, or arc-shaped, paracentral scotoma). 2. Diabetes-related retinopathy. 3. Retinal tears and retinal detachments.
Scintillating scotoma causes include: 1. Migraine headaches, including migraine with aurawith and without pain. 2. High blood pressure (hypertension). 3. Changes in hormonelevels. 4. Coagulation disorders (problems with the way your blood clots). 5. Retinitis pigmentosa, a group of retinal diseases that cause vision loss. 6. Cancer-associated retin...
Nov 9, 2022 · A blind spot is a very small gap in the visual field of each eye—an area of your relatively nearby surroundings that you can't see. It may sound like a physical defect, but everyone has a small natural blind spot (physiological blind spot), and it's not usually noticeable.
Your retina is made up of light-sensitive cells which send messages to your brain about what you see. Everyone has a spot in their retina where the optic nerve connects. In this area there are no light-sensitive cells so this part of your retina can’t see. We call this the blind spot.
May 7, 2020 · A physiological blind spot exists in all healthy individuals due to the lack of photoreceptor cells in the area where the optic nerve emerges through to the retinal plane (optic nerve head / optic disc).
