The positive in your situation is that your new GP did try to help and knows that were right to be concerned. She should be able to back you up if you want to take the matter further or even ask to be referred o another hospuital.
Your descripion of doctors talking over your head and your having o go home anfd look things up on the internet will be familiar to many of us I am sure.
I wonder if your GP;s comments in rying o sort your problem caused hem to send you that questionnaire.?
In your place I think I would give asking a question another ry in the first place, If you tend to sit here quietly they many think you dn't really want o know what is going on and that makes life asier for them.
CDont bombard thenm with quesions, just write down the most important question when you go to see the relevant person and make a point of asking it. Tell them it has been really worrying you. If this doesn't work go back to your GP . Tell her what happened and that you feel you are geitng nowhere Ask if it is possible for you to be referred elsewhere. Unfortunately Gps and hospitals no longer seem to cooperate.
I have he feeling that your problem could be sorted iout if you could only get to the righ person. if nothing else your Gp should be able to advise you how you can get some sense from the ospital. have you tried asking PALS. It is usually possible to contact them by email.
I should try them directly once more . They surely can't refuse to answer a direct question of such importance o you.
You just need o know what is going on and how and when they propose o treat you don' you?
If you get nowhere you could maybe try your local social services or the charities dealing with impaired vision. They should be able to advise and help you.
Hope this helps.