An irregular shaped cornea or lens prevents light from focusing properly on the retina, the light sensitive surface at the back of the eye.
形状不规则的角膜或晶状体会使光线无法在视网膜——眼球背面的感光膜上准确地聚焦。
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。
Sometimes the eye's natural lens has an imperfection or may not be shaped properly, which can make your vision blurry or distorted.
有时候，眼睛晶状体老化或不完善都将造成视力模糊或扭曲。
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