Fame
Even though you could afford a tall backyard fence as an orthoptist, you aren't likely to need one. Unlike movie and sports stars, you are free to go out back, lay by the pool, or even play a really bad game of badminton with the kids and never worry about the prying eyes of star chasers.
Go ahead, enjoy your super-secret, superhero. Former patients and their families may sing your praises if you help them, but that's about as far as your fame will go. We tend to think word of mouth fame is the best kind anyway. Recommendations mean new business and more money.