The average human retina has five million cone receptors on it. Since the cones are responsible for colour vision, you might suppose that this equates to a five megapixel equivilant […]
Read more »Category: Encyclopedia of the Eye
EYE COLOBOMA
Coloboma is a term used to evaluate some part of the eye as incomplete, missing one part, usually as a result of incomplete formation during embryonic development. So we have […]
Read more »GIANT CELL OR TEMPORAL ARTERITIS
Giant cell arteritis is a systemic vasculitis that can affect any artery, but mostly those are superficial temporal (temporal arteritis), ophthalmic, or vertebral arteries. Typically it affects people older than […]
Read more »PROGRESSIVE MYOPIA
The size of a refractive error in the progressive myopia is from -7 D to more than -30 D, with an error that increases gradually, that is, it progresses throughout […]
Read more »COLOR VISION DEFECTS
Disorders of color vision can be roughly divided into congenital and acquired. Congenital defects are almost always in the red-green area (they are found in 8% of men and 0.5% […]
Read more »FRONT ISCHEMIC OPTIC NEUROPATHY
This is an ischemic myocardial of the optic nerve in the lamina cribrosa. It typically affects people older than 60 years with vascular disease (atherosclerosis, temporal arteritis). Retro bulbar or […]
Read more »OPTIC NERVE ATROPHY
Any damage to the optic nerve fibers causes its atrophy, i.e., degeneration of nerve fibers and their myelin sheaths. The causative agent can act on the optic nerve in any […]
Read more »DYSTROPHIC CHANGES OF THE VITREOUS
Asteroid hyalose It is the presence of tiny white solid corpuscles dispersed in an otherwise normal vitreous. It is a dystrophic change that does not require treatment or makes […]
Read more »DEGENERATIVE CHANGES OF THE VITREOUS
Aging is accompanied by significant physical and biochemical changes in the vitreous. The most important changes are syneresis and ablation of the posterior vitreous. Syneresis is vitreous liquefaction, possibly […]
Read more »GLAUCOMA
Glaucoma is a disease characterized by periodic or persistent elevated intraocular pressure, damage to the optic nerve and visual field deterioration, and as a result of disease it is also […]
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