Search Results | pupil
Your search for "pupil" returned 196 results
Why do people have red eyes in flash photographs?
electronics.howstuffworks.com/question51.htm
Why do people have red eyes in some flash photographs? Take a look at the science behind why red eyes happen.
How to Draw Animals
lifestyle.howstuffworks.com/crafts/drawing/how-to-draw-animals.htm
Learn how to draw animals using our easy, step-by-step instructions. Helpful diagrams guide you in drawing a horse, cat, penguin, rabbit, and more.
How to Draw a Cartoon Dragon in 5 Steps
lifestyle.howstuffworks.com/crafts/drawing/how-to-draw-a-cartoon-dragon.htm
Have fun as you learn how to draw a cartoon dragon with our simple instructions. Sharpen your drawing skills as you learn to draw a cartoon dragon.
How to Draw a Sad Clown Cartoon in 5 Steps
lifestyle.howstuffworks.com/crafts/drawing/how-to-draw-a-sad-clown-cartoon.htm
Learn how to draw a sad clown cartoon with our easy instructions. Take your creativity to the next level as you learn how to draw a sad clown cartoon.
How to Draw a Cartoon Giraffe in 5 Steps
lifestyle.howstuffworks.com/crafts/drawing/how-to-draw-a-cartoon-giraffe.htm
Learn how to draw a cartoon giraffe with our step-by-step instructions. Stretch your artistic abilities as you learn how to draw a cartoon giraffe.
How Vision Works
health.howstuffworks.com/mental-health/human-nature/perception/eye.htm
A fascinating article that describes how your eyes and vision works!
How Refractive Vision Problems Work
health.howstuffworks.com/human-body/systems/eye/vision-refractive.htm
Millions of people have refractive vision problems -- when the eyes get blurry or can't focus on an object. Learn about four major types of refractive vision problems.
How the F-Stop Works
electronics.howstuffworks.com/cameras-photography/tips/how-to-know-what-f-stop-to-use.htm
Want to know how to know what f-stop to use? Visit HowStuffWorks to learn what f-stop to use.
Can You Ace This Basic Animal Trivia Quiz?
play.howstuffworks.com/quiz/can-you-ace-this-basic-animal-trivia-quiz
Were you the kind of kid who always seemed to know the answers to questions about animals? Put that knowledge to the test and see if you can remember some basic animal facts!
How Biometrics Works
science.howstuffworks.com/biometrics.htm
With the help of Q, James Bond can breeze through a security system that requires the villain's irises, voice and handprint. Biometrics isn't just for the movies. Real-life businesses and governments are using it. Check it out.