Well, when I want to respond to a pm, there is a box that appears, with 5 letters, varying in size, blue in color with a fuzzy background of varying sized chunks of blue "bits" and before my response will be accepted I have to get the letters right.
To borrow an old saying, it's a pain where I can't put a plaster. Don't need to change browser font size as some of the sizes of the letters are small and some are large.
Could possibly use new eyes.