Little House on the Prairie

I'll Be Waving As You Drive Away (1) (4x21)

Air date: Mar 06, 1978

Mary falls in love with Seth. When Mary's eyesight starts to get worse, Charles takes her to a specialist. He is devastated when the specialist tells him that Mary will lose her sight. Charles is unable to tell Mary for a while that she is going blind. When Mary does go blind, the whole family suffers.