“Vision, diopter, diopter” the relationship between the three!

Abstract: refraction generally refers to the change of the optical path of parallel light. For the eyes, the most direct refractive change is reflected in the bending degree of the lens. The closer the visual object is, the greater the curvature of the lens is. In terms of adjustment, it is more laborious. In terms of self feeling, it is eye fatigue, which is equivalent to the symptom of too long reading time in close range;

people often ask: how much is my eyesight and how much should it be? How many glasses should I wear? Some will say how many degrees I am now, and what should my eyesight be? What is the relationship between diopter and diopter?

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first say “eyesight”, which simply means people’s ability to see things clearly. The quality of eyesight is judged by the distance of seeing things clearly. The good ones are 1.5 and 2.0, and the poor ones are 0.1 Light perception (that is, you can’t see clearly and can only feel the existence of light). There are many factors affecting vision, and eye inflammation can cause vision loss (trachoma, red eye disease, etc.); trauma can also cause visual acuity decline; diseases such as crystal opacity, vitreous opacity and retinopathy can also cause visual acuity decline; however, most of the visual acuity decline of young students is mostly related to close eye fatigue, mostly adjustment disorders and ultimately organic diseases (that is, the anterior posterior diameter of the eyeball changes and the eye protrudes).

Refraction generally refers to the change of the optical path of parallel light. For the eyes, the most direct change of refraction is reflected in the bending degree of the lens. The closer the visual object is, the greater the curvature of the lens is. In terms of adjustment, it is more laborious. In terms of self feeling, it is eye fatigue, which is equivalent to the symptom of too long reading time in close range; Lens is the most direct adjustment structure for human eyes to see far and near. It is equivalent to a convex lens. Different from the convex lens in physics, it is adjustable, that is, it can adjust its bending degree according to its own needs to change the distance of focus and achieve the purpose of seeing objects. There are certain requirements for the determination of the degree of

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. Generally, it is based on the minimum degree that people can see the position of 1.0 of the visual acuity chart at 5m. It is only an indicator for people to see the specific curvature of a state of a specified thing. Changing the position will have different requirements and reflection, so the glasses do not need to be worn all the time. It is only the change of refraction that people need to see about 5 meters away.

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people’s original intention of matching glasses is often because they can’t see things far away (such as the blackboard, the face of the person walking opposite, the vehicle coming in front, etc.), and the purpose of optometry glasses is to solve the problem of seeing far, so there is a principle for glasses matching, that is, it is based on the minimum degree of 1.0 visual acuity chart at 5m. Unfortunately, our ophthalmologist’s reading is crooked. Glasses should have been worn selectively, but they have to tell myopia patients To wear it often, imagine the results of wearing it all the time: first, give up self-regulation, because there is no need for self-regulation; Seeing close can be seen without glasses, but wearing glasses incorrectly is used to see myopia about 5 meters away. At this time, to see close objects is the same as adding an additional adjustment load to the eye muscles, which is equivalent to the additional need to successfully adjust the distance. This is why people often ask, doctors say that wearing glasses can control the degree development, why do glasses wear deeper and deeper?

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are very simple. Ophthalmologists ignore the most basic fact: glasses are only a means of correcting vision, not a means of treatment, which is not conducive to the improvement of their naked vision. They mistakenly regard a plan of rights and interests as an invariable truth and a panacea. To put it more directly, myopia glasses are nothing more than to see objects about 5 meters away. Everything else is good for nothing. People can be rational in reading glasses: a little observation will find that people with presbyopia often wear glasses only when they see close, and remove them after reading, because they don’t need glasses to see far. If they wear them all the time, it will only increase the adjustment discomfort of looking far. However, the wrong wearing of myopia glasses is due to the ignorance and thoughtlessness of our ophthalmologists at first, and then the malicious misleading of some doctors.

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vision often refer to the ability of our fundus retina to form a clear image; The diopter refers to the diopter of our eye refractive system. Different people can have different eyesight at the same degree; Similarly, the same vision can have different degrees. But for the same person, in the same period, the higher the degree, the worse the eyesight. There is a certain correlation between the two, but there is no formula for mutual conversion. Objectively speaking, what should be concerned about at ordinary times is vision, not degree. The thinking habit of optometry and glasses has led people into the misunderstanding of glasses. Once glasses are matched, it is basically equivalent to giving up treatment. Therefore, the traditional ophthalmology of academic school has the conclusion that myopia cannot be treated. This kind of misleading and even unconscious, but the harm is huge.

myopia glasses are only a vision correction tool, not a treatment. Its only effect is to improve corrected vision, which has no effect on the improvement of naked vision. On the contrary, it has contributed to the accelerated decline of naked vision. People wear myopia glasses, his far vision is improved, but his eye muscle self-regulation function is also abandoned, and the stalemate eye muscle has not been effectively relieved. When you also wear glasses when you look close, it increases the burden on the eye muscles, because the eyes should first offset the degree of glasses, and then see clearly. In this way, the bending light adjustment of the eyes is additionally increased than that without glasses. Therefore, it has caused the accelerated decline of vision and the rapid development of glasses. This is the main reason why the more glasses are worn, the deeper they are.

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have always been an obvious misunderstanding in the development of Ophthalmology: optometry is very important, which leads to the serious reality. Nowadays, the introduction of excimer laser surgery and corneal shaping lens is the same as the introduction of Western glasses in the past. They all adopt an inclusive approach. If they are a little more rational and dialectical, they will adopt an attitude of sublation. Unfortunately, they don’t. It has the taste of mainstream medicine and the taste of glasses instead of optometry. The popularity of optometry glasses has caused an uncontrollable situation. Instead of reflecting, laser surgery and corneal shaping lenses, which are equivalent to optometry and matching glasses, began to blossom everywhere. They are joy and worry, God knows