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Etiology - The main cause of myopia (nearsightedness) is a distortion in the shape of the eye where either the cornea is overly curved, the eyeball itself is too long (horizontally), or both. Common factors that may exacerbate this ocular deformity include genetics and consistent prolonged up-close tasks (reading or screen time).
Symptoms - Blurry distance vision, eye strain/fatigue, squinting, headaches, and trouble seeing while night driving.
Details - Myopia is extremely common and often a mixture of genetic and environmental factors. The distorted shape of the cornea/eyeball causes light to focus in front of the retina, which then leads to cloudy, unclear vision of objects at a distance.
Treatment - Like an astigmatism and hyperopia (farsightedness), myopia can be treated with prescription glasses/contacts or LASIK surgery.
Visual example of how light focuses in an eye with myopia vs without.
Photo Creds: LMC Optometry & Eye Care
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