ARE THERE ANY OTHER CLEARER CAPTCHAS FOR BLOGGER?

So that some followers can comment, I have stopped using the catpcha which blocks spam by robots. The system was successful. I know the captchas used on Blogger are difficult to see, and there are times when I have clicked away at the captcha till a usable one has shown up. Even so, what is on offer is pretty difficult to read, especially for certain vision prescriptions, especially when the offerings are grossly distorted, as they are, with the captchas that are on offer by Blogger.

I am now receiving spam. Does anyone out there please, know of a different style of captcha that can be uploaded - with instructions - for use with Blogger, if so, where may I find them, please?