Elliot underwent six procedures to improve blood flow and make him fit enough for major surgery.
Saffie's mum says Luxturna therapy at Great Ormond Street has been like "someone waved a magic wand".
Harry Northmore and his dad Alan are hoping to raise £5,000 to thank the hospital for its care.
Scarlett Clarke, 20, from Gloucestershire, was born with a type of birth mark on much of her back and torso.
Alaric, born with several congenital heart defects, is a "super-bright" boy, his parents say.
Jennifer McNeill is mum to Bay who has faced life-threatening health issues since she was aged two.
12-year-old Vivaan Sharma was one of 94 patients harmed by surgeon Yaser Jabbar
A report by Great Ormond Street Hospital finds that nearly 100 children were harmed by the surgeon.
Orthopaedic surgeon Yaser Jabbar treated hundreds of children over a period of about five years.
