As for the blower thingy in the eye test ~ you wanna try the retinopathy test you have annually if you are diabetic. That is awful ..................... but necessary.
Thankfully I don't.
Strangely they combine the retina photographs, which involve painful eyedrops and a lot of waiting about and the wearing of sunglasses, no matter what the weather, for several hours aftreward, with a foot and lower leg examination that includes sticking needles into the soles of your feet. Apparently this testing of pedular extremities is equally important to rule out possible gangrene, which they tell me diabetics are prone to