There is no doubt seeing their child smile for the first time is an unforgettable moment for parents everywhere.
But the memory is even more precious when that cute grin, and accompanying chuckle, goes hand in hand with the moment a baby sees their mother clearly for the first time.
This is exactly what the family of little Leopold Wilbur Reppond witnessed recently when they put glasses on the four-month-old vision impaired boy for the first time.
The gorgeous baby at first looks a little confused when his mother Erin places the glasses on his face. He puts his head down as he adjusts to the big change the glasses make to his vision.
"Hi honey," Mrs Reppond says before her son looks up and stares intently at his mother's face. Then comes a giggle and smile so adorable they will melt the hearts of everyone who watches it.
The video of the special moment was captured by Leo's proud dad David, a film maker, who was overcome with emotion.
"Cuteness went through the roof. (There) wasn't a dry eye in the house," Mr Reppond told Daily Mail about the moment Leo saw mother Erin for the first time.
"I had some issues holding the camera because I was crying so much.
"I was overwhelmed with emotion. It's just very touching. You cannot anticipate how you're going to feel when something like that happens. It was very heartwarming.
"Leo looked at my wife for the first time and saw her for the first time."
Leo, whose family is from Seattle, Washington, has been diagnosed with a rare disorder called oculocutaneous albinism.
About one in 20,000 children have the condition which affects the colour of a person's hair, skin and eyes and leaves them with very bad vision.
Leo's new glasses are manufactured by a US company called Miraflex. The glasses have normal lenses but the frames are made of a rubber like material which has no screws, no hinges and no sharp edges so they are comfortable for a baby to wear.
The little boy's parents are overjoyed with how well Leo has been doing since he started wearing the glasses earlier this month.
"He can see us now. He's starting to see objects in front of him for the first time," Mr Reppond said.
"He's smiling a lot more and he can see everybody in the room, he's interacting more.
"He loves the light and he loves being outdoors where he can see the grass and the blue sky. He loves toys and he's starting to reach for things.
"He's seeing the world differently."