You realize that this is stereotypical and NOT funny. One does NOT make fun of handicapping conditions! Poor taste! And yes, they do have picture day at schools for the blind. Some students are low vision, and why shouldn’t all their parents have school pictures?
My problem with this strip is that hitting Goat in the head should NOT knock him out – what do you think goats do with those horns anyway – they knock other goat’s heads around.
Actually, that’s “Houston, YOU have a problem”