Little House on the Prairie (1974) : 5x4

Amelia, a new girl that Laura meets in school, is ashamed of her very overweight father. Her father works at the blind school where Mary works. All the blind students like him a lot. They claim that they can see his love. One day, Laura and some other students from school, start making fun of the overweight person, not knowing that they were making fun of Amelia's father. Amelia's father pretends to leave town since his girl is so ashamed of him. He hides out at the blind school. When he is involved in an accident, Amelia reveals to her dad how much she loves him.