The customer has myopia since she has discovered that in order to read printed material, she must hold it at arm's length.
Myopia is a refractive error. Refractive issues happen when our eye does not correctly focus light on the retina. Refraction is the name for that focusing (bending). To see clearly, light must go between our cornea and lens. The cornea and lens distort light so that it lands on the retina. The retina transforms light into impulses that the brain subsequently translates into visuals. Because of the shape of our cornea or lens, people with refractive abnormalities cannot correctly bend light. When light is not focused properly on the retina, vision becomes blurry.
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