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How Corrective Lenses Work
science.howstuffworks.com/innovation/everyday-innovations/lens.htm
Eyeglasses are one of the most common sights in the world. Learn what goes into creating the lenses and how to read an eyeglass prescription.
Contact Lenses
health.howstuffworks.com/wellness/cosmetic-treatments/contact-lens.htm
To the millions of Americans with vision problems, the world can be a blurry place. For people who need vision correction but don't want to wear glasses, contact lenses offer an easy, virtually invisible solution. Learn how contact lenses correct sight, look at the variety of lens options that are available and find out how to wear them safely.
What is fisheye lens photography?
electronics.howstuffworks.com/cameras-photography/tips/fisheye-lens-photography.htm
Look through a door's peephole and you'll see how a fisheye lens can distort a scene while providing a 180-degree view. So how are fisheye lenses used?
What is a tilt-shift photography lens?
electronics.howstuffworks.com/cameras-photography/tips/tilt-shift-photography-lens.htm
Tilt-shift photography takes the power of the angle to an extreme. Learn how tilt-shift photography can make a normal scene look like a miniature model set.
Could you put a camera in a contact lens?
electronics.howstuffworks.com/future-tech/could-you-put-a-camera-in-a-contact-lens-.htm
How viable is the idea of an image-capturing contact lens? Find out how close we might be to embedded cameras in contact lenses.
How Does a Fresnel Lens Work? The Magic Behind the Glass
science.howstuffworks.com/question244.htm
I have a thin piece of plastic mounted on the back window of my RV. It magnifies things so I can see better when I'm backing up. How can such a thin piece of plastic magnify things? A regular glass magnifying lens would have to be curved on both sides and much thicker.
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 Cameras Work
electronics.howstuffworks.com/camera.htm
Cameras and photography have transformed how we see the world. Learn about cameras, photography, how 35mm cameras work and about making a homemade camera.
How to Clean a Digital Camera
Want to know how to clean a digital camera. Visit HowStuffWorks to learn how to clean a digital camera
What Is Aperture?
electronics.howstuffworks.com/cameras-photography/tips/aperture.htm
Aperture is a photography term and it is something you can adjust when taking pictures. Visit HowStuffWorks to learn all abut aperture.