Have you ever gone to the dentist and, despite always brushing twice a day, leave with an appointment to come back for a filling? That’s because cleaning your teeth becomes so routine that you’re just going through the motions without very much care. The same idea applies to putting in your contact lenses – because it’s a daily chore, you’re probably cutting corners without even thinking about it.

Ever since LASIK gained approval from the U.S. Food and Drug Administration in the 1980s, people have been clamoring for a chance to improve their eyesight almost overnight. Various benefits have contributed to LASIK’s rise in popularity – everything from short recovery times to painless procedures has made LASIK attractive to patients of all ages.

Though LASIK can give you better eyesight than you ever thought possible, it can’t help you see in the dark. For that, you’ll have to turn to one of the most iconic military devices of modern times – night vision goggles.

For every majestic eagle and elegant horse that Mother Nature gives us to marvel at, there are animals that don’t boast quite as impressive abilities. Evolution has given every animal a purpose and the tools to achieve it, but that hasn’t saved a few critters from drawing the short stick in the lottery for good vision.

Though modern medical science has managed to produce several noteworthy breakthroughs, such as custom LASIK procedures that can give patients better vision than they ever imagined, there are still a number of things that doctors don’t understand about the human body. For example, scientists still can’t say for certain why humans need to sleep every night.