What is Refractive Eye Disorder?
Any disorder which affects the ability of the eye to focus on an object is Refractive Eye Disorders. The lens and the cornea bend the light rays so that a proper image can be formed on the retina. The shape of the cornea is fixed, but the lens changes shape to focus on objects at various distances from the eye. Therefore, when the cornea and lens cannot focus the image of an object sharply on the retina, it is called a refractive error or refractive eye disorder.
Causes of Refractive Eye Disorders:
The lens and cornea may not be able to refract light rays to focus them on the retina correctly for several reasons. The eyeball may be too large, hence the light is focused in front of (rather than directly on) the retina, and the person has trouble clearly seeing distant objects. This is called nearsightedness (myopia). In some people, the eyeball is too small, so light is focused behind the retina. This is called farsightedness (hyperopia). Some people have an deformed cornea (not perfectly round or spherical), which may cause objects to appear blurred at any distance. This is called astigmatism.
In early 40s, the lens gradually becomes stiff. The lens cannot change shape easily, hence it cannot focus on nearby objects, which is a condition called presbyopia.
Treating Refractive Eye Disorder:
The usual treatment for refractive errors is to wear corrective lenses. However, certain surgical procedures and laser treatments that change the shape of the cornea also can be performed to correct refractive errors. Generally surgeries and laser treatments are very costly as compared to wearing corrective lenses. Therefore, Pinhole Glasses is the cheap and the best alternative to cure or minimize Refractive Eye Disorder.
Pinhole glasses are the best modern and affordable alternative to prescription eyeglasses. They consist of precision-manufactured lightweight perforated plastic lenses, inset into standard metal or plastic spectacle frames. Ideally they are made for sufferers of refractive eye disorders, the elderly and heavy computer users.
The pinholes on the Pinhole eyeglasses which are accurately (formed by laser technology) and equally spaced holes of approx 1mm - 1.5mm in diameter. Due to their perforated holes the glass allows only direct and coherent light rays to pass through it. When this restricted light beam passes through the pupil and into the eye lens, the effects of any refractive eye disorders are reduced, hence reducing the size of image also known as blur circle on the retina. The resulting visual image is has good clarity, properly defined and perfect brightness.
So if you are suffering from myopia (near-sightedness), hyperopia (long-sightedness), presbyopia, astigmatism, computer vision syndrome or cataracts then Pinhole Eyeglasses is the answer for you.
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