Education

Difference Between Blind Spot and Yellow Spot

Core difference

The human eye has three layers 1) .sclera 2) .choroid and 3) .retina. The sensory layer of the eye which is the retina and which contains two types of cells called rods and cones. The yellow spot consists of cones only because it appears yellow and is present in the center of the retina. The yellow spot or macula lutea is an elevation of the retina present near the blind spot and has a very high resolution. The blind spot is present posteriorly where the optic nerves exit the eye. The blind spot does not have rods or cones, so the part of the image that falls in this region is not perceived.

Blind point

Also known as a scotoma, it is a darkening in the visual field. A blind spot is a region of the visual field present on the retina that corresponds to a lack of light-sensing photoreceptors in the optic disc where the optic nerve fibers pass through the optic disc. Because the blind spot has no light-sensing cells in the optic disc, the corresponding part of this field of vision is invisible. So the part of the image that falls in this field of view is not perceived because it has no photoreceptors, the optic disc is present on the nasal side of the macula lutea. It is oval in shape and measures approximately 1.5mm in diameter. The blind spot is also an entry point to the eye for the main blood vessels that supply blood to the retina. The blind spot lacks depression.

yellow stain

Also known as the macula lutea. It is an oval-shaped pigmented area that is present in the center of the retina of the human eye. The yellow spot is a specialized structure for high-acuity vision because it contains a high density of cones (high-acuity photoreceptors). It is called a yellow spot because it absorbs excess blue and ultraviolet light that enters the eye. So we can say that this region of the retina acts as a natural sunscreen. The yellow coloration of this region comes from its content of lutein and zeaxanthin, which are yellow xanthophyll carotenoids. The macula lutea can only be seen in light from which red has been filtered. The fovea is present in the center of the macula and has the highest concentration of cone cells. Therefore, the yellow spot is responsible for the central, high resolution, color vision that is only possible in good light. The yellow spot or macula lutea has layers of eyes. Yellow spot lacks visual receptors but is sensitive to light.

Key differences

  1. The blind spot or scotoma is a region of the visual field present in the retina that does not have photoreceptors for detecting light, while the yellow spot or macula lutea is a pigmented area present in the center of the retina and contains a high density of photoreceptors. for light detection.
  2. The blind spot lacks both rods and cone cells, while the yellow spot has cone cells.
  3. The blind spot has no pigment, while the yellow spot has a yellow xanthophyll pigment.
  4. The blind spot has no visual receptors and is insensitive to light, while the yellow spot also has no visual receptors but is sensitive to light.

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