If you're looking for a vertex distance conversion charts, you've found the motherload. Here you will find vertex distance conversion charts for single powers (i.e Sphere power only), as well as for astigmatism (Sphere + Cylinder combinations). Pdf versions of all the charts shown on this page are available on The Lost Contact's Downloads page. … Continue reading Vertex Distance Conversion Chart Motherload
The Optics of Vision – Lesson 8: Astigmatism
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
How To Convert A Glasses Prescription To Contact Lenses: Astigmatism
In the previous lesson: "How To Convert A Glasses Prescription to Contact Lenses", I covered only situations that did not involve any astigmatism correction. In this lesson, I will only be discussing how to convert a glasses prescription to contact lenses when there is astigmatism to deal with. Before I get into it I just … Continue reading How To Convert A Glasses Prescription To Contact Lenses: Astigmatism
Knowing Who Can Wear Contact Lenses
Can everyone wear contact lenses? No. There are definitely some people who can't wear contact lenses, but in this article, I will discuss the kinds of people who can wear contact lenses. Not only that, but there are some people for whom contact lenses are the best option for their vision, and I will go … Continue reading Knowing Who Can Wear Contact Lenses
Knowing Who Can’t Wear Contact Lenses
A contact lens fitting is a multi-step process that involves many important considerations, but perhaps the most important step is the one that precedes it all; determining if your patient can or can't wear contact lenses. In this article, I will walk you through the process of determining who can't wear contact lenses & who … Continue reading Knowing Who Can’t Wear Contact Lenses