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Myopia, also known as nearsightedness, causes blurry long distance vision. In a myopic eye, the eyeball is either longer than normal, or the cornea is too curved. Factors that contribute to myopia development are excessive screen time, less time spent outdoors, and family history of myopia. 

Myopia is diagnosed with a comprehensive eye exam. Glasses can be used to correct the vision, but they are ineffective at slowing progression. There are several types of treatment options, such as contact lenses or eye drops, that can be used to slow the progression of myopia.