the year I turned 40 I went in and had a good physical, did everything, including a 75 g glucose testing regime, no diabetes at that time. I am glad I did, my vision got quite a bit worse around age 41, quite dramatic to me, and I had vision testing. Was just age related. My changes are more gradual now, but I think it is common, since type 2 often appears in midlife for women, the same time as eye changes may occur.
Of course, its important to have it all checked out.
zen and the art of weight loss, finding the true path of en-lighten-ment