I use local specsavers and find the opticians even within the branch vary. I once had to have my pupils dilated so one of them could inspect my eyes more thoroughly due to small pupils. Two years later I suspected I would need to have it done again but a different optician in the same branch just used a gadget to help her. I'm not saying one was good the other note, but clearly using different processes. If I knew my eyes could have been checked without using a chemical to dilate my pupils I would not have agree to the dilation.
I have pigmentation at the back of my eyes, well, around the peripheral, that some opticians see and show some concern about, others don't even mention it. They all do seem to these days but from the time it was first spotted (years ago) I think I have a few checkups one after another (for about 4 years) where it wasn't even spotted. Interesting they dont seem to be able to compare the current photo's to those taken years ago either (where are they?), instead just say "we'll keep an eye on it". As it was spotted years ago I suspect it's normal for me - it can be an indication of a disease(retinitis pigmentose or something like that) that eventually leads to blindness but have had no other symtpoms and I think most who have it lose a lot of vision by my age. Apparently I could be a carrier where it stays dormant - luckily have no kids as I'd be worried!