this article is about a childhood developmental issue. TLDR High myopia is the medical term for extreme or severe nearsightedness. A person who needs a vision

this article is about a childhood developmental issue. TLDR High myopia is the medical term for extreme or severe nearsightedness. A person who needs a vision prescription of -6.00 diopters (D) or more has high myopia ... It's very important to manage myopia progression during childhood, before it becomes high myopia. Myopia typically begins during early childhood and progresses over time. The peak years of myopia progression are roughly between ages 7 and 15.5 ... For about 50% of people, myopia stabilizes by age 15, but it can progress until around age 24 for others. Low and moderate myopia fall between -0.25 D and -5.75 D. High myopia causes Nearsightedness primarily occurs as the result of a slightly elongated eyeball shape. When the eyeball is too long, light focuses too far in front of the retina. This causes distant objects to look blurry ... Inherited genes can play a role in the development of high myopia. Children have a greater risk of developing the condition when one or both parents have nearsightedness. Severe myopia does not generally lead to vision loss on its own. Instead, the progressive lengthening of the eyeball stretches and thins the retina and other eye tissues. This makes them more vulnerable to damage and disease.