By keeping your mind firing on all cylinders you will improve thinking and keep your mind sharp. Analytical thinking excercises like Suduko and crossword puzzles, video-games that require hand-eye coordination and the herb ginko biloba have shown in clinical trials to help, too.
Use it.
As an example, try answering some of these questions.
nothing
sharp-eyed, sharp-eyes, sharp-faced, sharp-shod, sharpshooter, sharp-tongued, sharp-witted
Bats eyes aren't sharp at all!Bats are blind and sense their food with motion.
Yes
A sharp smell aroma. Is one that is strong or makes your eyes water!
You can keep hand tools sharp by filing them. anonymous@oola.com
Sharp eyes, swift flight and sharp talons.
Very sharp ones.
you can keep your memory sharp by exercise ,having fruits ,taking rest,and don't think that you can not remember.
Animals keep snow out of there eyes by blinking :)
Keep Your Eyes on the Prize was created in 1956.
allegedly it is a reflex to keep your eyes from popping out