Converting a Glasses Prescription To Contact Lenses TUTORIAL – Part 4

Part 4 – The Power Cross & Advanced Conversion Charts In part 1, part 2 and part 3 of this tutorial series, you learned all about how lenses work, why prescriptions for glasses are sometimes different than prescriptions for contact … Read More

Converting a Glasses Prescription To Contact Lenses TUTORIAL – Part 3

posted in: Conversion Resources | 7

The Axis What is the Axis? As I’ve discussed in part 1 and part 2 of this tutorial series, when you have astigmatism, it means that your cornea has 2 principle curvatures in it, which requires two different lens powers in order … Read More