Mild myopia, moderate myopia and high myopia
Mild myopia: ≤300 degrees (≤-3.00D).
Moderate myopia: 300 ~ 600 degrees (-3.00D~-6.00D).
High myopia: > 600 degrees (> -6.00D).
Axial myopia and refractive myopia
Axial myopia: the most common is that the anterior and posterior diameter of the eyeball is too long (that is, the axial length of the eye is beyond the normal range), while the refractive power (that is, the refractive performance of other refractive components of the eye such as cornea and lens) is basically within the normal range.
Refractive myopia: the refractive power is beyond the normal range, and the axial length is basically within the normal range, mainly due to excessive curvature of cornea or lens or abnormal combination of refractive components.
Extended data:
There is no absolute relationship between vision and degree. The degree of myopia is not directly proportional to the naked eye vision. For example, someone with myopia of 800 degrees can see 0. 12 by looking at the far vision chart, while another person with myopia of 300 degrees can only see 0. 1 by looking at the far vision chart. 1.5 is the visual acuity, that is, which line represents the number that can be seen in the international standard visual acuity chart. 1.5 can see the 13 line, which is just a check standard.
Objectively speaking, what should be concerned about at ordinary times is vision, not degree. The thinking habit of optometry and optician leads to people's misunderstanding of optician, and once optician is fitted, it is basically equal to giving up treatment, so the traditional ophthalmology of academic school has the conclusion that myopia cannot be treated, which is misleading and even unconscious, but the harm is enormous.
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