Is the blind spot nasal or temporal?

The physiological blind spot is centered about 15 temporally from the point of fixation, due to the nasal anatomical location of the optic nerve head in relation to the fovea.

Where is the optic nerve located?

The optic nerve begins at the optic disk, a structure that is 1.5 mm (0.06 inch) in diameter and is located at the back of the eye. The optic disk forms from the convergence of ganglion cell output fibres (called axons) as they pass out of the eye.

Is the macula temporal to optic nerve?

The macula is the central 3 mm of the retina. It has intense pigment supplied by the retinal pigment epithelium. The fovea is the central part of the macula. It is located 3-3.5 mm temporal to the temporal edge of the optic nerve head.

Is the fovea of the nasal or temporal retina?

The fovea lies in the middle of the macula area of the retina to the temporal side of the optic nerve head (Fig. 13a, A, B). It is an area where cone photoreceptors are concentrated at maximum density, with exclusion of the rods, and arranged at their most efficient packing density which is in a hexagonal mosaic.

Where is the blind spot located on the retina nasally or temporally and why is this spot blind?

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.

What does a spot on your retina mean?

A Roth spot is a hemorrhage, which is blood from ruptured blood vessels. It affects your retina — the part of your eye that senses light and sends signals to your brain that allow you to see. Roth spots are also called Litten’s signs.

What is optic nerve in eye?

The optic nerve is a bundle of nerve fibers that serves as the communication cable between your eyes and your brain. The nerve fibers have a special coating called myelin.

Where on the retina is the blind spot located?

optic disk
One example of this is a blind spot or a small portion of the visual field that corresponds to the location of the optic disk located at the back of the eye. 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.

Is the retina and optic nerve the same?

Optic nerve: The optic nerve connects the eye to the brain. The optic nerve carries the impulses formed by the retina, the nerve layer that lines the back of the eye and senses light and creates impulses. These impulses are dispatched through the optic nerve to the brain, which interprets them as images.

Which side is the macula on?

A fundus photograph showing the macula as a spot to the left. The optic disc is the area on the right where blood vessels converge.

What is temporal retina?

The half of the retina that is nearest to the temple and from which nerve fibres are projected to the ipsilateral (same-side) cerebral hemisphere after passing through the optic chiasm. Compare nasal retina. From: temporal retina in A Dictionary of Psychology »

What is the retina of the nose?

The nasal retina looks at the temporal half of the visual field. The fibers that arise in the nasal half of the retina cross in the optic chiasm, and the information they convey reaches the opposite visual cortex.

Where do the nasal and temporal retina cross the optic nerve?

Fibers from the nasal and temporal retina travel together in the optic nerve, but are separated at the chiasm. The image from each temporal visual field (nasal retina) crosses in the chiasm to continue as an optic tract on the opposite side of the brain.

What is the difference between temporal and nasal visual field?

The nasal side of the left eye and the temporal side of the right eye receive input from the temporal and nasal visual fields, respectively (i.e. left visual field). Similarly, light from the right visual field is detected by the temporal side of the left eye and nasal side of the right eye.

What is the temporal side of the eyeball?

And then this outside part of the eyeball, which is over here and over here, is known as the temporal side of the eyeball because it’s closest to your temples. So this is the side closest to the temples. This is the side closest to the nose. So a ray of light coming from the left visual field will hit the nasal side of the left eye.

What part of the visual field does the temporal retina project?

The right and left halves of each visual field are reversed in their projection onto the retina so that the temporal (lateral) retina looks at the nasal (medial) half of the visual field. The nasal retina looks at the temporal half of the visual field.