When the kid gets to the NFL he can wear the tinted visor But while he is in youth league, HS and college, he needs to find another option. A good place for daddy to start his research:
Protective Eyewear for Children - AllAboutVision.com
And when he is ready to buy:
Goggles
These are "helmet compatible".
Dad says he does not plan to sue, he just wants to educate people about the boy's condition. Sounds like daddy needs some edgeyoumawkashun himself.