It is very hard to get information from opticians, optometrists and opthalmologists. They seem to like to obfuscate more than enlighten their patients. Can anyone suggest a good website which explains in simple terms what their job is all about? I had a deterioaration in the sight of both my eyes overnight (I now need glasses for driving and increased magnification for reading). GCA was not admitted by my GP but after a battle, I now have the diagnosis, and after seeing eye doctors, all they could say was that there was no sign of GCA on the retina. However, I was told on fairly good authority that the vessels at the back of my head could have got sticky and caused a clot, thereby causing the sight loss. Patients should not have to fight for information about their eye-sight. The information should be forthcoming and accurate. I think there is a lot going on which the ordinary person is not aware of, including defensive behaviour to protect other professionals from legal claims.