As a GP, I end up fielding a lot of letters from opticians. Specsavers branches locally are very variable – one is excellent, one is medium, one is pisspoor.
The glaucoma thing is an example, really the optician should have done proper visual fields. looked at the discs, and if they are decent opticians, proper contact tonometry, not just the air-puff thing. But lots do just the air-puff and send them on to us with no fields. Just embarassing. But even if this is all pointing in the direction of glaucoma – sometimes you need corneal pachymetry to tell if the pressure rise measured is significant/accurate, and OCT scans to see if it is important. Probably 50% we send up as ? Glaucoma don’t have it.
But there are some excellent independents, and Tescos seem better than Boots these days… YMMV and Ts and Cs apply…
For glasses only – if you know your prescription and are not going varifocal ( where you need accurate fitting and interpupillary distances etc etc) I’d consider going online. Glasses Direct have been good for me, and Money Saving Expert often has a section dedicated to voucher deals…