Under astigmatism even narrow parallel light beams will not combine into one point.

有象散存在时甚至很窄的平行光束都不能会聚在一点。

youdao

Under astigmatism even narrow parallel light beams will not combine into one point.

有象散存在时甚至很窄的平行光束都不能会聚在一点。

youdao