This article will talk to you about the degree of myopia and how to divide the degree of myopia into corresponding knowledge points. I hope it will be helpful to you. Don’t forget to bookmark this site.
Table of contents
- What is the visual acuity of 0.00
- How to divide the degree of myopia
- National standard for myopia glasses degree
- What is the minimum power of glasses
- What are the different angles of myopia lenses?
1. What is the visual acuity of 0.00
1. Glasses prescription. In fact, there is no reliable conversion formula for vision conversion, because different people with the same vision may have different prescriptions. Even for the same person, even if the vision of both eyes is the same, the prescription may be different. For example, if both eyes have the same visual acuity of 0.5, the right eye may have 300 degrees and the left eye may only have 250 degrees. Therefore, the following conversion list is only for general reference, that is, the corresponding relationship between vision and power for most people may be roughly like this.
2. The visual acuity of 1.0.8-0.6 corresponds to 100-200 degrees.
3. The visual acuity of 2.0.5-0.3 corresponds to 200-300 degrees.
4. The visual acuity of 3.0.3-0.1 corresponds to 300-600 degrees.
5. Vision below 4.0.1 corresponds to 600 degrees.
2. How to divide the degree of myopia
Types of eyesight There are many names according to different classification standards. According to the degree of myopia, it can be divided into mild myopia, which is less than 300 degrees, moderate myopia, which is 300 to 600 degrees, and high myopia, which is more than 600 degrees. Mild and moderate myopia are mostly simple myopia. Myopia in students can reach normal vision by using glasses and correcting it. Its occurrence and development are related to poor visual environment and belong to the category of myopia.Multifactorial inheritance. High myopia is developmental myopia, pathological myopia, poor vision corrected by glasses, and is an autosomal recessive inheritance.
3. National standards for myopia glasses prescription
National regulations on monocular vision ≥0.9 is considered normal vision, and corrected vision for myopia must also meet this standard. During the lens correction process for myopia, if the corrected visual acuity of each eye is improved to above 0.9 including 0.9, the visual acuity is considered to be normal. If the visual acuity of the eyes is below 0.8 or including 0.8, the vision is considered abnormal and there may be refractive error, including myopia, hyperopia or astigmatism. A dilated optometry medical test should be performed to determine the degree of myopia qualitatively or quantitatively.
Mydriasis usually requires the use of eye drops to dilate the pupil and at the same time paralyze the ciliary muscle to detect refraction and determine the specific degree of myopia. After the test, the refractive status or the results of myopia, hyperopia, and astigmatism are detected, and corresponding lenses are selected for vision correction. After adjustment, the corrected vision can basically reach 0.9 or above, including 1.0 or 1.2. At this time, the corrected vision is considered to be normal. , can be fitted with glasses. After wearing glasses, the vision in both eyes becomes normal and will not affect normal work and study.
4. What is the minimum power of glasses
1. Glasses The minimum degree of myopia is 0 degrees, which can be matched with planar light glasses. The minimum degree of myopia is 25 degrees. For mild myopia, if you need correction, you can choose 25 degrees or 50 degrees lenses, but it is best to go through accurate refraction before wearing glasses.
2. For adults with low myopia degrees, below 50 degrees, they generally do not need to wear special myopia glasses, but they can do so according to their actual situation. Choose lenses with low power. The lowest power of glasses is 0 degrees, and the power higher than 0 degrees is 25 degrees.
5. Myopia lenses What are the different angles?
Yes, a pair of lenses can reflect the degree of myopia and astigmatism. In layman\’s terms, the degree of myopia means that the degree of the lens is the same in every angle of 360 degrees. The degree of astigmatism means that the degree of one direction in 360 degrees is different from the degree of other directions! The degree of higher or lower degree in this direction is the degree of astigmatism.
Okay, this is the end of the article.Hope it helps everyone.
