Why Do We Need Eye Glasses?

Eye glasses are frames bearing lenses that are meant to be worn in front of the eyes in order to correct vision. Eyeglasses are also worn to protect eyes from flying articles and radiation. Sunglasses are specially designed to allow better vision during dazzling daylight and to protect eyes from high levels of solar UV rays.

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Eye glasses have been in practice since a very long time and will always be. Despite the mounting popularity of contact lenses and other eye surgeries, eye glasses always had their own charm and space. They are available in all types of materials and can suit anyone. Gone are those days when glasses where only available in boring frames and colors. These days, you can get eye glasses in fancy frames and a wide range of colors too.

There are several types of eye glasses that are available in the market these days. Some of them have been described as follows:

Corrective eye glasses - Corrective glasses are meant to correct refractive errors of the eye by adjusting the effective focal length of the lens. This modification can effectively alleviate the effects of medical conditions like myopia, astigmatism and hyperopia. Older patients experience a graver problem like presbyopia that results due to loss of elasticity of an eye's crystalline lens, gradually reducing the ability of lens to focus on objects that are in proximity to an eye. The power of an eye is calculated in diopters. Glasses that are used to correct myopia will have negative power and those used to correct hypermetropia will have positive power. Eye glasses that are meant to correct astigmatism will have two different strengths placed at right angles.


Safety eye glasses - These type of glasses are made with plastic lenses that are resistant to shattering. Such glasses are used to protect the eyes from any kind of flying debris. As per the accepted standards, a safety eye glass must be made from 1 mm thick eyeglass material. They are meant to be light weight and easy to wear.

Sunglasses - These are made to provide protection from bright visible light, especially UV light. This kind of eye glasses is made from photochromic lenses. These days, light polarization is added to eliminate horizontally polarized rays of light.

If you are facing any eyesight problems, you must consider opting for eye glasses. Clarksville, TN has a number of eye check-up centers that offer superior services.