halacha - What blessing does a midget say on seeing himself?

Following "reciting-the-blessing-of-meshaneh-habriyos-who-makes-creatures-different":

1. 
   

   what does a man that falls into that category, e.g. a midget, says upon himself?

   
   


2. 
   

   Does he have to see himself (like in a mirror) or just look at his body?

   
   


3. 
   

   How often does he say the blessing (if any)?