How do whales, seals, and polar bears protect their eyeballs when diving into cold water?

Question

At least some of them (animals), have blubber to protect their
insides---but their eyes are right up against the water. Do they
have a retractable lid of some sort?

Answer 1

Nictitating membranes.

Answer 2

goggles, or they jump in feet first (yes whales have feet didnt you know that ?) actually they hurt their eyes all the time, out in the arctic you see tons of polar bear eyeballs on the beach. its really sad, but you can donate to the polar bear vision fund, 1-888-bear-eye , for only $0.25 / day you can sponsor a blind polar bear, its a good writeoff too