What is the Axis on Prescription Glasses? Importance, Definition, and Details Explained
The axis on prescription glasses defines the direction for cylindrical power, which corrects astigmatism. It ranges from 1 to 180 degrees. A value of 90 indicates vertical orientation, while 180 indicates horizontal. Correctly setting the axis is essential for optimal visual clarity for the wearer. Understanding the axis is important for several reasons. First, it … Read more