1. Prescription Information:

   • OD = right eye
   • OS = left eye
   • Brand name (eg. Acuvue)
   • BC / Base Curve (a number between 8.0 and 10.0)
   • DIA / Diameter (a number between 13.0 and 15.0)
   • Power / Sphere / Rx (a number between -20 and +20)

2. In Addition for astigmatic patients:

   • Cylinder (a number between -4.00 and +4.00)
   • Axis (a number between 0 and 180)
     Cylinder and Axis are usually separated by a ×

Boston XO Reviews

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Written By: Edward

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Very Reliable Contacts

I have always heard good things about gas permeable contact lenses but I was always a disposable kind of guy. I had finally heard enough and I decided to give em a try. The first one that I tried was the Boston XO and I loved it right away. I could really tell that oxygen was getting to my eyes, they were even a little sensitive for a couple of days. The vision is perfect as well so I'm going to stick with these contacts.

Written By: Jesse

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healthy eyes

The Boston XO rigid gas permeable contact lens is really great for people who had problems with oxygen deficiency in the past. I use to wear soft lenses and because my eyes were not getting enough oxygen my eyes were always red and tired. When I almost thought I would have to wear glasses for the rest of my life, my optician decide we can give these fantastic GP lenses a try, and they are great. My eyes are white and healthy if after long hours at the office.