What is the prescription of the eye?

Well, I know, you go to the doctor, the doctor told you to look at the e after the prescription is over, the doctor didn't tell you to wear glasses! Then you are going to the doctor and asking, 'Doctor, why am I myopia, how far am I nearsighted, you can tell me about it?' That's it!!

The normal value of the eye power is 1 0, and the normal eye power is about 100 degrees.

1. Generally, myopia within 300 degrees is called mild myopia, 300 600 degrees is called moderate myopia, and above 600 degrees is called high myopia.

2. Usually the visual acuity of 1 0 or 5 0 is normal vision, higher than these two standards are good vision, and less than 4 8 are myopic eyes.

The main causes and pathogenesis of myopia:

1) About 85 myopia is related to near-sightedness (such as reading books, watching TV, watching computers, i.e., myopia three looks) and can be prevented and treated;

2) About 15 myopia is related to the elongation of the eye axis with growth, which is controlled by congenital variation or genetics and other factors, and the effect is poor. It can be seen that juvenile myopia is an eye disease that can be prevented.

Summary. Hello dear. The normal power of the eye is between 50 degrees of myopia and 50 degrees of hyperopia, which is called emmetypicia, greater than or equal to 50 degrees of myopia is called myopia, and greater than or equal to 50 degrees of hyperopia is called hyperopia.

Myopia of 50-300 degrees is low-degree myopia, 300-600 degrees is moderate myopia, and above 600 degrees is high myopia, on the contrary, 50-300 degrees of hyperopia is low-degree hyperopia, 300-600 degrees is moderate hyperopia, and above 600 degrees is high hyperopia. For astigmatism, normal people will not have astigmatism, but the vast majority of human eyes have astigmatism of 25-50 degrees, which can also be considered normal. Astigmatism above 50 degrees is considered abnormal, 50-200 degrees of astigmatism is low-degree astigmatism, and more than 200 degrees is relatively high astigmatism, which needs to be paid attention to, and even glasses are required.

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The power of the eye.

Is it a doctor? Are you a doctor?

Hello dear. The normal power of the eye is between 50 degrees of myopia and 50 degrees of hyperopia, which is called emmetypicia, greater than or equal to 50 degrees of myopia is called myopia, and greater than or equal to 50 degrees of hyperopia is called hyperopia. Myopia of 50-300 degrees is low-degree myopia, 300-600 degrees is moderate myopia, and above 600 degrees is high myopia, on the contrary, 50-300 degrees of hyperopia is low-degree hyperopia, 300-600 degrees is moderate hyperopia, and above 600 degrees is high hyperopia.

For astigmatism, normal people will not have astigmatism, but the vast majority of human eyes have astigmatism of 25-50 degrees, which can also be considered normal. Astigmatism above 50 degrees is considered abnormal, 50-200 degrees of astigmatism is low-degree astigmatism, and more than 200 degrees is relatively high astigmatism, which needs to be paid attention to, and even glasses are required. We are a manual customer service here, but if you have any questions, I will help you answer them, dear, <>

The above is the answer I summarized for you, I am very happy to serve you, please give me a thumbs up, thank you very much for <>

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I'm going to bring a few degrees.

Dear, according to your above situation, you need to wear 100 to 200 degree glasses. You can go to an optical store near you, and the staff will test your eye power to give you the matching glasses.

For refractive error, a detailed medical refraction should first be performed. If the results of small pupil refraction are suspicious, dilated refraction should also be performed. In addition to optometry, it is also necessary to check the eye alignment and adjustment.

As for how to calculate the prescription of glasses, it is not only based on the results of refraction, but also according to the position of the eyes. If it is a patient with internal oblivion, the degree of myopia should be low-corrected, and the farsightedness should be corrected by the foot. If it is a patient with external heteropia, myopia should be corrected by foot, and farsightedness should be corrected by low.

If the adjustment is ACA, the myopia should be low-corrected and the farsightedness should be corrected for the far-sighted. If ACA is too low, myopia should be corrected for foot, and farsightedness should be low-corrected.

Myopia can manifest as decreased visual acuity, and the prescription of the myopic eye can be determined by refraction examination, and no calculation is required. After the formation of myopia, it is necessary to wear glasses with appropriate prescription according to the results of refraction, and develop good eye habits to control the continuous growth of prescription. After the age of 18, if the prescription is relatively stable, laser surgery or lens implantation can also be used to normalize the corrected visual acuity of the eye.

In childhood, the body is in the stage of growth and development, and the degree of myopia will increase with the increase, relatively faster than that of adults. It is recommended to wear orthokeratology lenses to compress the cornea through its own hardness, which can control the elongation of the eye axis, thereby controlling the continuous growth of myopia.

In any case, it is best to keep the eyes of the dominant eye unchanged, and finally achieve the goal of seeing clearly, persistently, and comfortably after wearing glasses.

Question 2: What is the normal visual acuity of the human eye If it is an international standard eye chart, normal is; Chinese logarithmic eye chart, normal is.

Question 3: What is the power of a normal person's eye The function of the eye to refract light is called refraction, and the ability to refractive is expressed by optical power, which is called diopter. The refractive state of the eye when it is not used for adjustment is called static refraction, and the power of static refraction of the standard eye is +.

The refractive state of the human eye at the time of use adjustment is called dynamic refraction, and its power is stronger than that of static refraction.

The reciprocal of the focal length is called the lens power, or diopter, and is denoted by . If the focal length is 10cm, then =10d;

The power of a convex lens (e.g., a lens for farsightedness) is positive (+) and the power of a concave lens (e.g., a lens for myopia) is negative (-).

A +3 diopter lens focuses parallel rays of light 1 3 meters away from the lens.

Question 4: What is the best eye power, isn't there a graph of E up and down, left and right to test the eye power, and the results that can be have are very awesome.

The eye power is less than 25 degrees of myopia, less than 25 degrees of astigmatism, and less than 50 degrees of hyperopia, which is considered a normal range

Human visual acuity refers to the degree of viewing angle of the human eye. Humans are usually 124 degrees, and when focused, it is about one-fifth, or 25 degrees. The horizontal viewing angle of the human eye can reach up to 156 degrees in one eye and up to 188 degrees in both eyes.

The overlapping visual field of the two eyes is 124 degrees, and the comfortable visual field of one eye is 60 degrees.

The power of myopia is not calculated but obtained by doing a refractive examination, and it is best for children under 12 years of age to do dilated refraction after cycloplegia, and for adolescents over 12 years of age, they can do rapid dilated refraction.

Adults, such as 30-40 years old, can do a medical refractive examination, after passing the examination, you can obtain a more accurate refraction, you can know how many degrees of myopia or whether it is farsighted, whether there is astigmatism, through the medical refractive examination can be obtained.

If you have an exact refractive power, you must wear glasses as soon as possible to improve corrected vision and prevent fatigue when using your eyes in the future.

The power of the eye is calculated after we go to the eye center and go through a vision test.

The reciprocal of the focal length of the eye (the distance from the imaginary focus to the lens) is the power of the lens, and the value of the lens power of 100 is the power of the eye.

Note: The power of myopia lenses is negative, and the power of farsighted lenses is negative.