Well, I went for the promised medical. Aside from the serious diagnostics, it seems that quite a number of things are tested less formally...
There was a fair bit of form-filling (medical history stuff) which the doctor typed into an interactive application. (Bizarrely it at first didn't want to accept "Pneumonia" as a valid condition - I had it when I was 8, so it wasn't likely to be an issue.)
There was more eye testing - this time with quite specific near-vision reading tests, a squint test (My eyes do point in the same direction) and a "tell me when you can see me waving my fingers" peripheral vision test. Balance was tested by standing on one leg with my eyes closed; hearing by covering one ear while the doctor whispered some digits at the other end of the room.
I had a many-lead (12? 10? I should have paid more attention!) ECG (normal) - I didn't expect leads attached to my knees...
It's probably the most detailed medical I've had, and I passed - so I now have a JAA Class 2 medical certificate (valid for five years) which was the point of the whole exercise and spending £141 in the process...
Thanks for all your interesting comments about sight - I shan't rush into any unusual eye exercises...
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