Here's a suggestion:
Go to:
http://www.caa.co.uk/docs/49/SRG_MED...isual_Stds.pdf
and print off the CAA Class 1 Initial Visual Stadard and take it to another optician to see if you meet this standard rather than whether they can corrcet your eyesight to being perfect.
This has a couple of advantages, 1) it is as sure as you can be before you actually go for a class 1 and will tell you if you need specs to pass a class 1; and 2) there are a few tests they have to do which aren't in a standard eye test (such as colour, peripheral vision etc).
Hope this helps.
rtj