Absolutely flat mirror than an ordinary mirror goggles slightly some of the Lowland, which has the advantage of goggles in the water that did not arise as a result of differences in refractive effect.

• 绝对平面镜面则比一般的泳镜镜面稍显低平一些，这种泳镜的优点是在水中没有那种因折射而产生的差异效果。