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Refractive Errors

Astigmatism

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 Most people have some degree of astigmatism or ellipsoidal shape of the cornea, along with myopia. Astigmatism occurs when the cornea is shaped more like a cross section of a baseball, rather than a basketball. As a result, the images…
Eye Diseases

Presbyopia (Old Eyes)

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 A Prevalent Eye Condition in the Middle-aged The image of a father or mother who holds a text farther away with stretched hands, squints, or moves glasses up and down is familiar to all of us. In the middle years of life, which begins…
Refractive Errors

Hyperopia (Far-sightedness)

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The prevalence of hyperopia is less compared with myopia. The level of hyperopia is usually between +1 to +4 diopters, and it is rarely equal or greater than +8 diopters. The hyperopia occurs when either the eye has a shorter length…

Myopia (Near-sightedness)

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More than 25% of people in the world have some degree of myopia (approximately 15 million of Iranians are nearsighted). Myopia is a medical term for nearsightedness. The most important cause of myopia is genetic factors. Myopia usually…
Eye Diseases

General Information About Refractive Errors

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  Refraction of light through the eye Refraction of light is in fact a pathway the light rays travel from objects in our visual field to form a clear image inside the eyes.The visual system of our eye after receiving light and processing…