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.

People with allergies know that when the seasons change, they’re at risk for a few bad days. Sometimes, allergies affect your eyes, too. To maintain your vision and remain a good candidate for a LASIK procedure, you might want to brush up on the science behind allergies and the best way to avoid them.

Considering everything we know today about concussions and facial injuries, the fact that hockey players used to skate around without any kind of head protection seems like a piece of fiction. Concussions were just “getting your bell rung” and severe cuts to the face and head were badges of honor for goalies like Terry Sawchuk.

You finally got the LASIK surgery you’ve always wanted—so, what happens now? After LASIK, your vision immediately improves. The whole recovery process is quick as well. If you work at a job where the risk of eye injury is low, you can probably return to work the next day. You can even fly in an airplane within a day—just make sure to keep your eyes lubricated to protect them from the dry air of the plane.