Do you aware that your children maybe have some problem with their eyes, that can bothering when their in study? Here are some eyes problem that can be easily corrected by right lens. so High Five to Zenni Optical for the article and read it carefully.
MYOPIA
Myopia is a vision disorder characterized by poor distance vision. The myopia see objects more blurred with their removal. Thus, the myopic is one who sees better near as far. As soon as the object it looks away from him, the image of this object, which normally form on the retina when the size of the eye is normal, is formed in front of it because the eye is too long. In most cases, myopia does not affect the reading. With 5 diopters reading can be done at 20 centimeters. However, it is advisable to keep checking to play the muscles of accommodation.
Today all myopia can be corrected. To get a clear image of distant objects should be remote to be focused on the retina. The correction of myopia is to change the path of light rays to converge on the retina by using, among other things, concave lenses, recognizable by their thick board.
Correction of myopia
Myopia usually begins between 8 and 12 years, when growth of the eye has exhausted the reserve hypermetropia of childhood and progresses slowly to 20-25 years. Plus the start of early myopia myopia will be more severe.
PRESBYOPIA
Presbyopia is a vision disorder characterized by a decrease in near visual acuity. This is not a disease but a normal aging process of the eye and more particularly that of the lens by hardening sclerosis. This phenomenon affects all people over 50 years, since the lens begins to lose its flexibility.
In the farsighted, the image is formed behind the retina, the lens no longer able to accommodate, to see close properly. The best lens that you can hope for the best result is Zenni Optical on TV!!!
HYPEROPIA
Farsightedness is a vision disorder characterized by poor near vision, and possibly beyond, for high hyperopia or after 40 years. Thus, from a perspective, hyperopia is regarded as the opposite of myopia: the distant objects, which normally form on the retina, would be focused behind the retina because the eye is too short. For low hyperopia and before age 40, the lens can compensate by accommodating permanently, the image is formed on the retina. The vision is good, but the prolonged accommodation might lead to headaches. With age, the lens is more difficult to accommodate and hyperopic blur begins to see close up, then by far because the lens does not work then as well. If the hyperopia does not interfere (or little) when you are young, it becomes increasingly annoying with age.
This loss of autofocus is the physiological result of the gradual decline since the infancy of the plasticity of the cortex cristallinien and the elasticity of the capsule cristallinienne. The correction of hyperopia done by a spectacle lens or converging lens, which compensates for the anomaly.
Correction of hyperopia
ASTIGMATIC
Astigmatism is a defect of optical systems: the curvature of the cornea has an irregular shape, oval rather than round. The image perceived by the retina is different in different areas of the cornea. The light rays are focused into different points behind and in front of the retina which causes a distortion of the image. Thus, the lack of image sharpness: the image of a point is an image point, but a task or right.
Astigmatism results in an inaccurate, duplicated, blurred and distorted at all distances with longer horizontal or vertical lines. Thus, the astigmatism confuse letters close as the M and N, E and B or 8 and 0. Astigmatism results in a vision that is never good without being really bad, almost as far. In most cases, astigmatism is accompanied by nearsightedness or farsightedness. It increases the visual of the two anomalies. To correct astigmatism, it is sufficient to converge the light rays into a point, such glasses.
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