A Moment of Science

Posts tagged lenses

February 22, 2012

 

xerox photocopy machine

How Do Photocopying Machines Work?

Photocopying machines are fairly complicated devices, but the basic principal is pretty simple.

October 21, 2010

 

Close up of a White and gray cat with owner

Why Do Cats Have Slit Pupils And Humans Have Round Pupils?

You probably have noticed that cats have slit pupils and humans have round pupils. What are the advantages of each pupil shape?

June 29, 2010

 

Eyeglasses

Electronic Eyeglasses Look To Replace Bifocals

For those who strain to see both near and far, bifocals have been the answer for a couple hundred years. Until now.

December 4, 2003

 

Drugs Built into Lenses

Learn about the drugs put into contact lenses on this Moment of Science.

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