BETA
Chapter 1
The gateway of light
Chapter 2
The brain's darkroom
Chapter 3
The spectrum of color
Chapter 4
Vision variations and future tech
YOUR GOAL
Master of How the human eye sees
Ch 4 · Vision variations and future tech
artiteacher Drag light rays through the lens to figure out how your eyes focus the world.
artiteacher Vision variations and future tech
Beam the light inside (oh yeah!) / Digital sight comes alive (that's right!)
artiteacher Around age 40, the eye's lens begins to lose its flexibility, making close-up reading difficult—a condition called presbyopia.
artiteacher An irregularly shaped cornea or lens causes light to scatter, making images look blurry or stretched at all distances.
Fun Fact
Laser surgery: LASIK eye surgery reshapes the cornea using a cool ultraviolet laser beam, taking less than ten minutes per eye.
Glossary
bionic eye (noun)
An electronic device implanted in the eye to restore some degree of vision to those with severe sight loss. In 2013, the FDA approved the Argus II, a pioneering device restoring sight to blind patients.
An electronic device implanted in the eye to restore some degree of vision to those with severe sight loss. In 2013, the FDA approved the Argus II, a pioneering device restoring sight to blind patients.
Quiz
What physical shape anomaly of the eyeball causes human nearsightedness (myopia)?
Quiz
What eye condition occurs when the lens becomes stiff and less flexible with age?