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A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters.
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The dioptre adjustment mechanism of a pair of binoculars.
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Any lens system, such as a telescope.
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A theodolite or similar surveyor’s angle measuring device.
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An alidade.
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A surgical speculum.
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An instrument for drawing the skull by projections.
Additionally, a total of 12 vertical prism diopters was split between the two eyes to maintain single vision in primary distance gaze.
The weakest reading glasses are measured in at +1.0 diopters, and they can go all the way up to +3.5 diopters or more.
They are available in various diopters and some even have tints available.
Individuals with high myopia, greater than six diopters, can develop pathological changes in the retina, called degenerative myopia.
Myopia is less likely to develop by age 13 if a child still has at least 0.75 diopters of hyperopia at age eight.
But if a child has become at least 0.25 diopters myopic at this age then there is a 60 percent chance that the child will require spectacle correction for nearsightedness by age 13.
Patients with high myopia, greater than 6.00 diopters, have an increased risk of developing a retinal tear, hole, or detachment; a posterior staphyloma; a posterior vitreous detachment; or glaucoma.
A naked short-sighted eye, which would be corrected for distant objects by a spectacle glass of - Io diopters, may approach the object up to about 4 in.
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