today is heard and not think that it is a very complex medical term, but somehow it is. The following is also popular domain: people with myopia see more clearly the objects when they are close to the eye, while the distant objects appear blurred. The vision to read and work closely is clear, but the distance vision is blurred as if it were a cloud of steam that distorsionara it slightly.
affects a large percentage of the population, and so we can understand it is necessary to have a basic understanding of the major components involved in the system of approach to the eye: cornea, lens and retina.
The first
is a thick, transparent dome that covers the front of the eye and is situated in front of the iris (colored part of the eye). The lens is a transparent and doubly convex structure located behind the iris. The retina, for its part, is a thin membrane that covers the back of the balloon eye.
light-sensitive retinal cells make the rays that penetrate the eye into electrical signals that are sent along the optic nerve to the brain, which interprets images. In people with normal vision parallel light rays entering the eye and are collected and assembled by her cornea and lens (processes called refraction) to approach them in a way specified in the retina thus obtain a clear and sharp image.
In the myopic eye, the approach power of(principal_estructura_refractaria_deel_ojo) her cornea and the lens is too large with respect to the length of the eyeball. Light rays are converging too and are located in the center of the retina. This gives rise to a refraction error. In other words, sent a blurry and poorly focused on the brain.
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Tags: vision
