What is commonly known as the "white of the eyes"? Why does a Haemolysed solution still look red? Why is the pupillary light reflex important in the body? Why does the lack of melanin produce a blue/bluish-colored iris? What forms this color?
as soon as your child is old enough to read the letters. Younger children may be screened by matching images or describing symbols from a set distance. Some types of screening use special tools to measure the eye position or reflection of light from the back of the eye (the red reflex)....
There are many superstitions related to sneezing. One common belief is that if you sneeze with your eyes open, your eyeballs will come out of your head. But this simply isn’t true. Most people naturally close their eyes when they sneeze as a reflex. If you keep your eyes open, your ...
What structure of the eye focuses the light? What is the pathway of light through the eye? (a) What are the intrinsic muscles of the eye? (b) What is their corresponding function? What is an optokinetic reflex? The ___ can close the eye, as in blinking. What ...
Achoo syndrome is genetic. The photic sneeze reflex is a genetic trait that causes people to sneeze when exposed to bright light. It is actually a dominant trait. To test this genetic trait, go into a dark room (a bathroom with the lights out, a photo development room, a movie theater)...
Dry eyes, easy fatigue, itchy eyes, foreign body sensation, painful burning sensation, sticky secretions, fear of wind, photophobia, sensitivity to external stimuli; sometimes the eyes are so dry that the basic tear deficit stimulates reflex tear secretion, causing symptoms such as tearing in the...
Finally, note that when backlight strobing is enabled, screen flickering is introduced, though invisible to the human eye. Still, those very sensitive to it may experience headaches after prolonged use. Here’s a look at BenQ’s DyAc+ backlight strobing performance at 360Hz and how it compare...
Before I was born, he made photographs using a Yashica Twin Lens Reflex camera, a medium format film camera, and a handheld light meter. As a research chemist, my father used the 1956 Red Dial Leica If camera to determine and maintain the quality of the product the company produced. The...
"What is history? An echo of the past in the future; a reflex from the future on the past." --Victor Hugo
Crying or weeping is the shedding of tears (or welling of tears in the eyes) in response to an emotional state, pain or a physical irritation of the eye. Emotions that can lead to crying include sadness, anger, and even happiness. Wining A beverage made of the fermented juice of any of...