Astigmatism is the eye into parallel light the focus is not a section at it | МЁД и ПЧЁЛЫ

Astigmatism is the eye into parallel light the focus is not a section at it. Cause some of the reasons for astigmatism, more common are: For corneal bending degree anomalies change. As the largest meridian and QuGuangLi QuGuangLi the smallest meridian perpendicular, then cause rules astigmatism, more for congenital, and astigmatism large degree.