Nothing in life prepares you for finding out that you are going blind. I had no idea there was any problem with my eyesight until I casually mentioned to my optician, at a routine sight test, that I struggle to see in the dark. She made a detailed examination of my eyes and said nothing, but I knew from the look on her face that she had seen something ominous. I was told to go back the following day for a visual fields test.
Going blind at 24