How fast do finger nails grow?
Healthy nails grow about 0.8 inches (2 centimeters) each year. The middle fingernail grows the fastest, because the longer the finger, the faster its mail growth. Fingernails grow four times as fast as toenails. What are floaters that move around the eye? Floaters are semi-transparent specks perceived to be floating in the field of vision. Some originate with red blood cells that have leaked out of the retina. The blood cells swell into spheres, some forming strings, and float around the areas of the retina. Others are shadows cast by the microscopic structures in the vitreous humor, a jellylike substructure located behind the retina. How often does the human eye blink? The rate of blinking varies, but on the average the eye blinks once every five seconds or 17,000 times each day or 6ΒΌ million times a year. 20/20 vision defined: Many people think that with 20/20 vision the eyesight is perfect, but it actually means that the eye can see clearly at 20 feet what a normal eye can see clear
