You have missed the point, I took my wife to a specialised diabetic eye checkup and found the inadequate shambles described at the top of this thread. My wife does see an optician, but the optician doesn't match the eye check standards that I routinely have, also arranged by the NHS. But why should you and I be content with the service we obtain whilst "the others" get shovelled into a second rate seemingly cut price checking scheme. Everyone should be properly checked and advised.
You are deliberately missing the point.
You did NOT take your wife to a full diabetic eye check appointment.
You took your wife to a specialist eye screening service which was looking for one thing and one thing only - diabetic retinopathy.
There are a number of specialised services which go out into the community and test for only one thing, including glaucoma and breast cancer. As far as I know none of them test for any other conditions. This is the way the services have been designed and the way that they have been implemented.
If your wife has known sight problems then she should be under the care of a local optometrist or a specialist eye clinic which is intended to diagnose and treat her eye conditions.
It just so happens that I have the standard brochure in front of me now, as I am due my annual eye screening in early January.
This includes the words "Screening does not look for other eye conditions and you should continue to visit your optician regularly for an eye examination as well.". This seems pretty clear to me.
The brochure says that you get drops in your eyes, photographs taken of the back of your eyes, results about 6 weeks later. So it seems clear from the brochure that ALL you are getting is photographs of the back of your eyes.
I am assuming that you are making sure that your wife has comprehensive eye care from a suitably trained specialist.
Meanwhile, ranting about a service not delivering things which it was never intended to deliver seems remarkably unproductive.
I do note that the accompanying letter from my local NHS on behalf of the eye screening service (not the standard brochure which should go out with all the eye screening test appointments) it very woolly and vague.
My copy says "The aim of eye screening is to detect any changes caused by diabetes that could cause damage to your sight." It also says "Helps to detect any risk to your vision caused by diabetes."
These statements are vague and potentially misleading, and I will raise them with my local NHS and Diabetes UK.
I was involved in the design of the brochure in conjunction with Diabetes UK so I will try and track back and see if there is anyone still around who can take up the issue.
However it is very clear that the service your wife attended is not a scam and you should perhaps be a little more cautious in the ways you go about defaming a legitimate service provider providing a legitimate service.