Saturday, April 26, 2008

Some Facts about the Eyes

Human eyes are the physical object of our sense of sight. It was considered as the most precious and complex of all the human senses. As it began to take its function from the time we wake up in the morning up to the time we go to bed to sleep in the night, whatever we look at, pleasing or unpleasant, dark or bright; our eyes keep on working, as well as it continuously sending and relaying information and data to the brain for processing, interpretation and storage.

Of course, everybody knows how the eyes play its role as one of the five human senses, how it is protected by the eyelids and the bony eyebrow of the human skull. We also know that the iris determines the eye colors as it differs from person to person (unless we use colored contact lens), how the pupils contract and enlarge its muscle as it receive varying levels of light. Everybody knows as well how the optic nerves communicate with the brain cells. Everyone knows visions are not always perfect that is why we need corrective eye-glasses in order to have clear sight.

However, here are some questions maybe you already know which needs some review:
• Do you know that each eye has 130 million light-sensitive-cells?

• Do you know that the images retained to the retina are upside-down?

• Do you know that a newborn baby sees the world upside down because it takes some time for the baby's brain to learn to turn the picture right-side up?

• Do you know that most people blink between two to ten seconds at a time?

• Do you know that human eyes are closed at least in an aggregate 30 minutes each day because each time you blink; you shut your eyes for 0.3 second?

• Do you know that with just one eye, every image will appear two-dimensional (this doesn’t work by just closing one eye)?

• Do you know that color blindness affects 1 of 30 people?

• Do you know that men are more affected by color blindness than women at a ratio of 1:12?

• Do you know that dogs are colorblind, yet, how do we know?

• Do you know that dogs’ night vision is much superior to humans?

• Do you know that the cat's or dog’s eyes glow in the dark because of special silvery "mirrors" that reflect light, making it much easier for them to be distinguished in the dark?

• Do you know that ostrich has eyes that are two inches across wherein each eye weighs more than the brain?

• Do you know that chameleon's eyes can look in opposite directions at the same time?

• Do you know the owl’s sight can see a mouse moving over 150 feet away with light no brighter than a candle?
Maybe you can add more something you know!

Look at this photo – If it appears right to you, then, maybe you’re drunk. Or you’ve just wake up, risen-up from your bed. And maybe you’ve already indulged yourself to much time in front of your PC. This will show that distorted image transmitted to the brain may be interpreted as a correct image when the brain itself is somehow impaired in whatever manner, or vice versa.

Did we take some time to ask ourselves – How do we use our eyes properly? What do we do to take good care of our eyes?



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3 comments:

Pinay Jade said...

The picture there made me dizzy! I know I might not be taking very good care of my eyes by blogging too much! I should rest my eyes now;)

greg said...

Freaky picture right there.

Thanks for sharing the trivia btw.

We do need to take good care of our bodies.

My .02

Greg

tahn said...

Good afternoon. The focus group discussion (FGD) would tackle topics mainly focused on blogging. Therefore I am trying to gather people who express themselves well to have a discussion as to why they blog, what drives them to continue blogging and why they choose to use one particular blogging service (eg. blogspot etc). I really hope that you can make it. Due to the conflict of schedules, it seems like the FGD will be moved to Friday or Monday next week. Same time 630-7pm :) I really hope that you could possibly confirm this time. :) Thanks :)