Hi
@John 62
Blurred vision and headaches concurrently should be taken very seriously. There are a handful of rare conditions that should be ruled out. If your GP is useless I would suggest you take a coffee and go sit at A&E where your eyes will have a full check over.
There is one condition in particular called Giant Cell Arteritis which my mum has with these symptoms, If this has not been already ruled out you are very much in your rights to got to A&E as the condition is seen as a medical emergency. The optician May know if this was checked when u visited them. or call and ask the GP.
The condition is very easily treatable so don’t panic but do make sure you follow this up.