Eric Antoniou Photography From left: Joey McIntyre, Bianca de la Garza, Moi Blaton and daughter Elle, and Wyc Grousbeck at Massachusetts Eye and Ear Infirmary. New Kid on the Block Joey McIntyre doesn’t get back to Boston as much as his kids would like. “They have a lot of cousins here and they love to see each other,” says Joey Mac, who grew up the youngest of nine in Jamaica Plain. (He was last here over the summer to shoot the film “The Heat,” with Sandra Bullock and Melissa McCarthy.) Joey Mac is back now, if only briefly, to attend Tuesday’s gala fund-raiser for Massachusetts Eye and Ear Infirmary , a place that’s near and dear to his heart since his 2½-year-old son, Rhys, was born with severe hearing loss. “He’s doing fabulous,” says Joey. “You never want to say you’re out of the woods, but thanks to my wife [Barrett], who’s done all the legwork with the audio/verbal therapist in LA, Rhys is doing great and is in the same school as his older brother and comfortable and learn...