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How is high myopia diagnosed?

High myopia is often first diagnosed in childhood, when vision problems begin to develop. During the examination, the doctor uses tests to measure the ocular health, depth perception, and refraction ability (visual acuity test). Eye movement coordination is also tested. Dilating the eyes enables doctors to take a closer look inside the eyes. Then, using a measurement scale based on dioptres (units of measure that represent an eye's ability to focus), the doctor will determine the degree of myopia that is present. A rating of -6.0D or more is symptomatic of high myopia.

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