he has a rare form of blindness that progresses over time. he got the diagnosis when he was 13 soon after landing a role on "saved by the bell: the new class." >> if you can make money losing, we'd be millionaires. >> i loved acting, being on a set, and, you know, it's just exciting. >> reporter: but acting wasn't his dream. law school was. >> as i really started experiencing vision loss in college, it was more the nuisance than a disability. >> undeterred, he got into harvard law school and made it to the supreme court. he clerked for sandra day o'connor. >> it's hard to anticipate slowly losing your vision and living as a blind person. >> now at 31, he's legally blind. >> i'm dealing with light and dark, maybe the occasional sort of shape. >> while he can't overcome his blindness, he hasn't let it stop