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Infection can be an underlying reason for a corneal ulcer, which resembles an abscess on the eye. If left untreated, a corneal ulcer may lead to severe vision loss.
The very first spot of neuropil would be the outer plexiform layer (OPL) wherever connections involving rod and cones, and vertically operating bipolar cells and horizontally oriented horizontal cells manifest (Figs. 5 and six).
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A round industry of roughly 6 mm around the fovea is considered the central retina although over and above This is certainly peripheral retina stretching on the ora serrata, 21 mm from the center on the retina (fovea).
The human retina is a fragile Business of neurons, glia and nourishing blood vessels. In a few eye diseases, the retina results in being damaged or compromised, and degenerative variations set in that eventally cause severe harm to the nerve cells that have the important mesages about the visual image into the Mind.
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Fig. 21b. Corrosion Forged from the higher again of the human eye Along with the sclera removed. The vortex veins gather the blood in the equator of the attention and merge Using the ophthalmic vein. (From Zhang, 1994).
Glaucoma (Fig. 23) is also a common issue in aging, wherever the pressure within the eye results in being elevated. The pressure rises because the anterior chamber of the attention are not able to Trade fluid thoroughly by the conventional aqueous outflow methods.
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When an anatomist will take a vertical area on the retina and procedures it for microscopic examination it will become evident the retina is much more intricate and contains a lot of additional nerve cell forms as opposed to simplistic plan (higher than) had indicated.