For most, it's their first eye exam, and they arrive a little nervous. But the circuit set up to check visual acuity, eye convergence, and diopters is like a game, and little by little, the children sit down and listen to the instructions of the volunteer professionals. "Maybe they'll give me glasses because I can't see the blackboard from far away," explains seven-year-old Yovor. Like him, around fifty children and adolescents will pass through the rooms set up as small opticians at the Pere Tarrés Foundation's Raval Socio-Educational Center to help vulnerable families pay for their exams and also for glasses should they ultimately need them.

When Rosa first opened her eyes the day after her nearsightedness surgery, she couldn't believe she could see the numbers on her alarm clock perfectly clearly. She was 32 at the time, and she hadn't been able to see anything without glasses for 26 years. "When I went to the beach and got into the water, I had to have a visual reference. A red umbrella and a blue one next to it. And when I got out of the water, I had to look for a red spot and a blue one," explains this journalist, illustrating what life is like with ten diopters.