you to ordinary people doing extraordinary things as part of the "human factor" series. for most of isaac's life he studies law but he was told he would be going blind but dr. sanjay gupta didn't let it slow him down. >> reporter: his job is taking care of the three beautiful new babies. that's a challenge for him because he can't see his children. he has a rare form of blindness that progresses over time. he got the diagnosis at 13, soon after landing a role on "saved by the bell: the new class." ♪ >> hasn't won in ten years. if you can make money losing, we would be millionaires. >> i loved acting, being on a set. and, you know, it's just exciting. >> reporter: but acting wasn't