The fish has a little friend who gives him away, even if he is very still. Even if he’d like to, he can’t shake his shadow. The faint image of the fish is always accompanied by the more pronounced shadow. Well, as long as the sun is out. Our eyes ar...
The American Academy of Ophthalmology recommends that you protect your eyes whenever you're in the sun long enough to get a suntan or sunburn. Wearing a brimmed hat cuts sunlight exposure to your eyes by about half. Sunglasses will further boost your protection. The sun's rays can also refle...
Photo: Testing viscoelastic hysteresis: I took a lump of viscoelastic bed mattress in my left hand and a simple kitchen sponge (ordinary elastic foam) in my right. I squashed each one 10 times, allowed it to return to shape, and timed how long the process took. The ordinary sponge deforme...
With June being Cataract Awareness month, millions of Americans over the age of 40 have some degree of cataracts, which is the clouding of the natural lens in the eye. The solution is most often, surgery with the minimal need for eyeglasses afterward, Dr. Joseph Calderone of Better Visi...