Fuzzy Fonts

So a visitor said that the fonts on my blog appear fuzzy on his mobile device.  Any suggestions?  Also, apparently – and I can’t see this myself – the comments require a Word Verification.  I thought I had disabled that, but it looks like I merely took away my ability to see it on the comments section.  Is there a way to completely rid myself of that meddling Word Verification?  Thanks for any input!