• A Soviet factory in Donetsk (Ukraine) manufatured 13,000 pairs of sunglasses before someone noticed that they were so dark that they "blinded" the wearer.
• A soap bubble is one of the thinnest substances the naked eye can detect. It is composed of two layers of fat with water trickling between them.
• The greatest sensitivity of the human eye to color, hue, or wave length occurs at 555 nanometers, which happens to be the exact shade of yellow green of a forest canopy.
• Two out of 161 players in the baseball Hall of Fame wore glasses.
• President Theodore Roosevelt survived an assasination attempt when his glasses case deflected the bullet.
• One minnow species has two sets of eyes, one pair above the waterline and the other below.
• 6.5% of men are colorblind compared to 1% of women.
• Eating carrots will not improve your eyesight unless the cause of bad eyesight is vitamin A deficiency.
• Masseurs in ancient Japan were required by law to be blind.
• There was a blind counterfeiter in San Francisco who used the wrong color ink on his bills.
• Most newborns have 20/50 vision.
• If your vision is 20/400, you are legally blind. This means that you can see at 20 feet what others can see at 400 feet.

Some of the items listed here are from Trivia Time Issue #40 from Roseville and Granite Bay