When the eyeball is too long from front to back or the cornea is too curved, the result can be myopia, better known as nearsightedness. People with myopia can see close objects clearly, but objects at a distance look blurry. In normal vision, the image of a distant object gets focused...
To understand how our eyes can see a distant object like a candle flame flickering, it helps to know something about normal vision and how the human eye works. While visual acuity varies among individuals, the naked eye definitely is a pretty impressive piece of equipment. It's capable of 1...
Most vision problems occur when the eye cannot focus the image onto the retina. Here are a few of the most common problems: Myopia (nearsightedness) occurs when a distant object looks blurred because the image comes into focus before it reaches the retina. Myopia can be corrected with a mi...
These problems are then usually linked to the cooperation between the eyes, for example in some form of discernment. Usually, the person with ideal vision does not experience any problems with the vision until he / she becomes of age. Different eye disorders Astigmatism, myopia, hyperopia and ...
How does the presence of two eyes help in binocular vision in our daily tasks? Why infrared radiations are used for photography in dark? Who invented the camera, and why? How can we observe / prove the existence of things smaller than ...
13. Get your eyes checked It may surprise you, but poor vision can decrease image sharpness, too! You may fail to acquire perfect focus, you may accidentally focus in the wrong place, or you might not notice if your lens has a focusing problem. ...
In a reflection hologram, monochromatic or white light reflects off of the surface of the hologram to make an image. Your eyes and brain interpret the light shining through or reflecting off of the hologram as a representation of a three-dimensional object. The holograms you see on credit ...
Convex lenses are used in things like telescopes and binoculars to bring distant light rays to a focus in your eyes.Concave lensesA concave lens is exactly the opposite with the outer surfaces curving inward, so it makes parallel light rays curve outward or diverge. That's why concave lenses...
Theiris- The iris is the colored part of the eye. The color of the iris is determined by the color of the connective tissue and pigment cells. Less pigment makes the eyes blue; more pigment makes the eyes brown. The iris is an adjustable diaphragm around an opening called thepupil. ...
Strabismus–A condition in which one or both eyes do not line up when looking at an object (the eyes are “crossed”). Since the eyes point in different directions, the brain cannot form a three-dimensional picture of the object.