I wear lenses and glasses so every year I have to attend sight tests and lens after care appointments. Part of the pre-screening includes a visual field test now that until this time was unknown to me. In case you haven't had it it involves looking into a screen concentrating on a red dot and then being asked how many green dots you can see as they are generated across the screen in succession. It is like a computer game really but you need intense concentration. I missed one dot in my left eye test and it had to be repeated and all was ok the second time. However it made me wonder if my ME was to blame as the concentration needed is immense and I found it all very exhausting. Anyone else find eye tests tiring and in particular this visual field test?