近視眼戴平光鏡遊泳

Written by on October 11, 2018

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原來泳鏡在水中折射率和空氣中不同,有彎曲度的球面鏡,會造成近視多出250-350度,弧面鏡則會讓散光高達900度,度數突然加深、容易暈眩想吐。…

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