I think it's hilarious how poorly these other reviewers understand the movie. Babes, it does not take superior intelligence or even serious attention to detail to understand what is happening in this movie. Sweethearts, take one hot second to watch what is going on and you'll get it. There is actually a very clear progression in character development and plot. The numerous sexual scenes may be a bit much for someone's taste, but they actually do serve a purpose.
Potential spoilers: As Gina rediscovers the world lives in, she realizes nothing is how she imagined it, not her home, not even her husband's face. She gets joy out of watching people and herself have sex because she has never seen that before. She is having a sexual awakening because she is experiencing sex in a whole new sense! Imagine you went all of puberty and early adulthood without an entire sense and then suddenly you got it back for the first time since childhood. You would get to experience all the joys of adult things in an entirely new and exciting way. So maybe it seems like a bit much to some people that all these scenes are included, but it is an essential part of her discovering who she is as an adult who can now see. Another really KEY aspect of this movie that I think these 1 and 2 star reviewers are missing entirely is the uh whole effin point of the movie. It's not about her regaining sight nearly as much as it is about a controlling and toxic relationship built on her needing him. As soon as she doesn't need him anymore to function in the world, he becomes very insecure and possessive. DEFINITE SPOILERS: He tampers with her medication to make her lose her sight again. He fakes a robbery to get rid of her dog. He makes sure she is completely dependent on him because his need to control and possess her is greater than any real love for her. If this isn't clear, pay attention to the last scenes when he is reading the note from the kid who found the dog. It is all about possession and the false equivalency he makes of that to love. There's a reason his voice is the one we hear reading that note. His view of love is childish and underdeveloped. In the end, when he understands finally that he has lost any real or imagined control of this independent person, he loses control of himself too.
She does not just gain physical sight, she gains insight into the reality of her relationship. She slowly wakes up to the fact that her husband does not love her - he loves her dependency on him. He even says early on when she asks if he gets tired of taking care of her, "No, it makes me feel special." And that, folks, is what she finally sees about him in the end.