It often develops in childhood, with the eyeball starting to elongate, becoming more egg-shaped than spherical, or the lens becoming too curved, so the light entering the eye is not focused correctly.
这通常是童年时形成的，眼球逐渐被拉长，变得越发像蛋形而非球形；或者是因为晶状体过度弯曲，进入眼睛的光线无法正确聚焦。
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