Just had mine done yesterday. After years of invariably getting a migraine afterwards no matter how careful I was about sunglasses and being in dark spaces they agree to do the test without the drops. Apparently drops are used to limit recalls due to dark images. But this means those of us that struggle with side effects might well be having the drops unnecessarly as many of us can still have a good quality image without the drops, although as we age our eyes dilate less well on their own. They can see then and there if the image is likely to be good enough. As the room wasn’t that dark I cupped my hands around the eye being tested to maximise natural dilation and it look like it worked. Just waiting on official notification it was ok (and hopefully so are the blood vessels). Theres is also the option of half strength drops more usually used on pregnant women.
So if the drops cause you issues beyond a couple of hours of light sensitivity and blurring ask rathr than suffer.
Despite not being pregnant, I think I have been given the half strength drops most of the time.
Whilst I have not experienced the nasty headaches, one one occasion it took about 5 hours for the blurring to clear. Now it only takes 30 to 60 minutes.
I have been luck to not need to drive but there is a clarity needed to walk (especially cross the road) which I now have when I leave the surgery but didn't have in the "early days".