I just started wearing contacts in June and I like the concept. I've been wearing glasses since the third grade and after all these years, I can finally say that I own a pair of cool shades! But I do have some questions/concerns/problems. I am a bifocal lens wearer and the Accuvue multi-focal lenses I tried are just weird... So, I'm in single vision lenses and wear reading glasses to see up close. No biggie as my vision isn't all that bad; I can read the dashboard and radio in the car just fine, can read my wristwatch, etc. w/o the reading glasses. Just need them for fine print, and to chimp... Anyway, I go home with the initial pair of free lenses and all is well. I'm amazed how much clearer they are then glasses, at least for me. I then get into the box of lenses I paid for and something is awry with my right eye. I can see clearly for a few minutes, then things get fuzzy. Eventually my eye gets irritated to the point where I have to remove the lens. Frankly, I had some problems at first understanding which was way the correct side out, etc., but even after I got past that, I had the same issues. Finally, while out of town, I put a lens from my left eye into my right eye and bingo, all is well. (Each eye has a different strength prescription...) I wear them that way for a week then go back to have my prescription updated. The eye doctor tells me that I should see better with the initial prescription but seeing how the strengths are so close, he didn't have a problem changing it for me. So, I finish out that initial box of lenses and all is well; no more irritation, etc. and I can see sharp as a tack. Tonight I open up a new box of lenses and the left eye is fine but the right eye is now fuzzy... Long distances are fine (the lens is a bit stronger then the initial prescription) but things like the license plate of the vehicle in front of me are not clear, although they used to be. So, my questions are these: Is it normal to have variances between boxes of lenses? I'm wondering if making these just isn't an exact science and one can expect slight differences between boxes. Has anyone else had this problem/situation? Can it be the diameter of the lens is different for my right eye then my left eye? (Or whatever those other two numbers on the box signify...) I am bound and determined to make these work. I just need to know if what I'm seeing is normal or not... TIA!!!