What is Axis in Glass Prescription? Definition, Importance, and Meaning for Vision
Axis in a glass prescription shows the angle of cylindrical power used to correct astigmatism. It is a number between 1 and 180 degrees. A value of 90 means vertical positioning, while 180 means horizontal. This information helps the optometrist align the lenses correctly for improved vision. Understanding axis is important because it allows eye … Read more