Retina Blind Spot

The optic disk is approximately 1 5 millimeters or 0 06 inches in diameter. The retina is encased in light sensing proteins which transmit what they sense to the optic nerve. Peripheral scotoma a blind spot or decreased area vision located on the edges of the vision field which has a minimal effect on the vision and daily life paracentral scotoma a blind spot or decreased area vision located near the central area but not in the central area of the vision field with a greater impact in the vision and daily life when compared to peripheral scotoma.

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A blind spot is actually a small area within your visual field that contains no detected vision.

Retina blind spot. The blind spots occur because the optic nerve ends in the field of the retina itself. Your retina which is a thin layer of neural tissue at the back of your eye is made up of tiny light detecting cells called photoreceptors. A blind spot or scotoma is an area on the retina without receptors to respond to light.

This causes symptoms such as blurred central vision or a blind spot in the center of the visual field. 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 the blind spot of the right eye is located to the right of the centre of vision and vice versa in the left. The hole may develop from abnormal traction between the retina and the vitreous or it may follow an injury to the eye.

Light enters the eye by passing through the pupil and hitting the retina at the back. In macular degeneration the center of your retina begins to deteriorate. It may sound like a physical defect but everyone has a natural blind spot or physiological blind spot in their vision.

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 through the optic disc. In addition to being the point where the optic nerve exits the eye. If you close your left eye and look at the dot with your right eye and repeat the process the plus sign should disappear in the blind spot of your other eye.

The optic nerve in turn relays that message to the brain. Why you have a blind spot. The blind spot is the location on the retina known as the optic disk where the optic nerve fiber exit the back of the eye.

This is the blind spot of your retina. Where s is the size of the blind spot on your retina in cm d is the diameter of the blind spot on the card and d is the distance from your eye to the card in the examples above 10 in 25 cm or the length of your arm roughly 2 2 5 feet 60 75 cm.

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