Knowledge of eye lens technology .
Old boys who wear glasses often the people who are nearsighted . Left eye Initially used only lens solution eye problems . Can not filter uv light or color adjustment. Automatic lens .. However, with technology developed . Properties of the lens is changed, let's start with the main plain glasses do better ..
Glasses consists of two parts: a metal or plastic , and the lenses are designed to correct conditions are refractive . Which there were four cases as follows .
Myopia is the condition in which the eye can not look beyond the obvious. I can see things more clearly , we are called not long or short or near term .
Presbyopia is the condition in which the eye far more clearly or may not be far less obvious . And often have a closer look at the less obvious . We have long known that if found in children may occur with strabismus squint .
Astigmatism means that the eye condition unclear. Due to the curvature of the cornea. Not a sphere like a football, but it 's more like a rugby ball . And that not of strabismus or squint squinting . Overall , it is nearsightedness, farsightedness or astigmatism are making the visible unclear. I also have another one called.
The human eye or eyes means the sight of the elders who starts aging. Typical onset at age 40 years or more symptoms that are going to start looking or reading distance or regular ever read. Not clear Some people feel dizzy Some people might have eyestrain . I feel it is time to look beyond the usual . (Except that the short -sightedness or tilted with ) But the condition is commonly referred to as farsightedness, is looking more blurry then to hold book drive more glasses lens used was the same as sighted people as well.
The four cases mentioned above. It is necessary to use glasses to correct vision exists. It be seen as normal, there are two cases that may or may not use glasses or an eye condition in which there is little. Case, glasses or no visible not differ much. And glasses to the stunning fashion, or add personality to look better after two cases may not require any glasses .
The glasses can correct vision disorders . Because it relies on characteristics of the lens in refractive lens that is used to correct farsightedness . Elderly and visually Using a concave lens to correct myopia And tilt the lens to correct the astigmatism.
Subscribe to the knowledge of the composition of glasses in my next article .
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