After studying this lesson, you will understand a concept that eludes the vast majority of people - Astigmatism! But before you proceed, keep in mind that this is Lesson 8 of the course and it is highly advisable that you have read lessons 1-7 before tackling this one. THE OPTICS OF VISION – LESSON 1: … Continue reading The Optics of Vision – Lesson 8: Astigmatism