A prism is a solid object that has the same cross section along the entire length of its shape. And prism in eyeglasses are used to help people for double vision, positional correction, or convergence correction. In fact, prism glasses can be very useful in dealing with eye misalignment. So, they are also used by people with lazy eye.
Prism Eyeglasses are not exactly like normal glasses. They do not improve the vision of an eye or even both and you cannot count on it to help you see better from afar or even up close.There are some people whose eyes don't focus at only one point, one eye is looking somewhere while the other one is looking elsewhere and this condition is called Strabismus or Squint. A condition like this causes double vision.Prism glasses help bring the different points of focus of both eyes to a middle point by distorting the glasses.A prism can be defined as any physical object with its cross-section being the same along the entirety of its length,This prism is used in eyeglasses to correct symptoms of double vision, convergence correction or positional correction.
The fundamental is that making you are like to watch further when you see the object which is close to your eyes. So that it can make your eyes of relaxing, and can be very good to avoid myopic and its development. It is a small glasses wearing on your glasses' framework.You can wear it just when you are reading and writing closely. Prism can reduce pressure of eyes, make the eyes muscles relax. It was used in the stable myopia degree, such as concentration on reading, writing and making homework. But the rest of the time you don't have to wear it. To ensure that effect, please use every day more than 2 times, and each time guarantee above 30 minutes. Seeing nearly you should try your best to insist on wearing it. And every time after using, please choose to see far things for a while.
The prism is a solid object with the same cross-section around its length of shape. In general, the prism is used for double vision, positional or convergence correction. And it works for a person who has almost normal vision of his/her level of nearsightedness or farsightedness. But one eye has obvious more or less reduced vision than that of the other one, or blindness. It is not suitable directly use prism lenses.
Nowadays, prism glasses are very popular because of their enhanced features and functionality. First of all, prims can help to show an image outside the range of sight. What's more, according to the recent report prisms are playing an important role in helping people with hemianopia. Moreover, prism glasses are a way to correct some visual abnormalities and prism lenses are necessary to help to make the eyes to work together. Finally, prisms are usually used to correct double vision, positional or convergence.