At birth, most infants are hyperopic, but when the eyes grow they usually become less hyperopic and by age 5-8 years emmetropic. |
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This ability of accommodation decreases progressively with age and causes presbyopia in emmetropic patients at the age of about 45 year-old. |
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An emmetropic person means the image received by his eye projects exactly on his retina. |
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In a normal or emmetropic eye the curvature of the cornea is such that entering rays are focused on the retina, forming a clear image. |
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With increasing age, more children are found in the emmetropic category and fewer in the low hypermetropic category. |
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When growing up, the eye can reach a normal size and the child becomes emmetropic. |
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This included patients who were nearly, or were, emmetropic and patients who wore contact lenses and needed help for shorter working distances. |
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He can see a clear image nearer than the emmetropic patient. |
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In an emmetropic eye, light focuses on the retina. |
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In an emmetropic or normal eye the light beams of what you observe are refracted in such a way by the cornea and the lens that the image arrives exactly on the retina. |
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Without accommodation, a presbyopic, emmetropic eye which is perfectly corrected for near vision, will see the letters blacker on a green background, or with the same contrast on either background. |
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The 3D Clip-Ons fit nicely over most Rx glasses, and allow visually impaired moviegoers to enjoy their experience as much as their emmetropic friends. |
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