Usuario:Sniper Vision System Review Tab2
The camera lens are also made from magnifiers, for which Sniper Vision System reason, we can get whatever size of photos as we expect, by adjusting the distance between lens and films. Even glasses belong to one kind of magnifier. Moreover, besides the main function of the magnifier to enlarge objects, magnifiers can also focus the sun's rays or highlight on the paper to make fire, and the more intense the light, the easier to get fired. Nearsightedness or nearsighted eye is also called myopia.
Nearsightedness is self-explanatory in its definition. It is a refractive defect of the eye in which in which nearsighted people can see nearby object clearly but have difficulty in reading and seeing objects at a distance. We know the human being's eyes have the ability of focusing images of both nearby and distant objects, because the lens of the eyes can assume a large curvature to focus nearby objects and a flatter shape to bring a distant object into focus. When the eyes are not able to provide a long focal length they can't focus on distant objects, so nearsightedness occurred. Nearsighted problem is very common in youth. It is said that 1/3 of the population is nearsighted.
Bad behaviors such as sitting close to the television while watching TV, holding books very near to the face, reading in sun or in a bus can lead to nearsightedness. Some evidence suggests that if one or both parents are nearsighted, their children are more likely to be nearsighted. Nearsightedness can be determined by eye exam, measuring in diopters by the strength, and the prescription is a negative number, the higher the number is the worse the eye's condition is.
