I just picked up a new pair of glasses (frame & lenses are new, ground thin and have the anti-reflective coating--same as my old glasses). My left eye has a slight astigmatism and I am near-sighted (about -3.75 diopters). My new glasses are great except.....

My vision in my left eye wearing my new glasses is not as good as the vision in my right eye, or as good as the vision when wearing my original pair of glasses. The left eye is slightly blurry at distances. (Fine close-up.)

The person who sold me the lenses confirmed that both pairs of glasses (old and new) have exactly the same prescription in them. She said that the new pair had "flatter" lenses and, as a result, my astigmatisim was more noticeable. She said that "most people get used to it" and that I would need to wear the new pair of glasses for 2 weeks before returning the glasses. What she said was that I would "get used to it"--but that if I didn't, I could bring the glasses back in and they would increase the "base level" or something similar to that. She said that that would fix the problem.

Here're my questions:
1. does "get used to it" mean that I'll fail to notice my left eye vision is wrong? or does it mean my eye will adjust and I'll see just as well in a week or two?

2. it seems strange that they can "fix" this problem with a new one. Did they mess up? Are the glasses right? Why does one pair work and the other not?

3. If they can "fix" it, why wouldn't I just fix it?

Anyway, any other insight would be extremely valued too. I paid a great deal of money for the glasses and I'm concerned/bummed.

Thank you!

There is more to verifying the new glasses besides measuring the prescription.The pd (distance between lens optical centers) needs to checked,each eye individually for proper positioning.vertex distance(spacing between lens back surface and eye) needs to be checked,frame wrap and pantoscopic tilt as well as lens base curves (in both meridians to determine if any lens warpage is present) all need to be investigated.Differences in lens materials can also cause problems.A lot of opticals are staffed by people that are either too lazy to do proper troubleshooting or who lack the knowledge or experience to know what to do.They dont want to do an immediate redo because of the costs involved.

Thanks for the reply. They did say something about how the base level was different in the two pairs of glasses and that this difference accounted for the change in vision. My question is: When they tell me I'll get "used to it" does that mean I'll see OK? or does it mean they screwed up and they're hoping I'll ignore it after a while?

The vision clarity likely wont improve.

I think if you are new to astigmatism, then it might take some a few days to get used to it( few weeks might be too long).......but after a few days, definatly take it back, and have them check it....or if you don't believe in the salesman, talk to an optometrist, or a manager at the store.....