^

Health

A
A
A

Classification of myopia

 
, medical expert
Last reviewed: 23.04.2024
 
Fact-checked
х

All iLive content is medically reviewed or fact checked to ensure as much factual accuracy as possible.

We have strict sourcing guidelines and only link to reputable media sites, academic research institutions and, whenever possible, medically peer reviewed studies. Note that the numbers in parentheses ([1], [2], etc.) are clickable links to these studies.

If you feel that any of our content is inaccurate, out-of-date, or otherwise questionable, please select it and press Ctrl + Enter.

Clinical classification of myopia prof. Avetisova

  • By degree:
    • weak - up to 3.0 Dpt;
    • average - 3,25-6,0 diopters;
    • high - 6.25 D and above.
  • By equality or inequality of refraction of both eyes:
    • isometropic;
    • anisometropic.
  • By the presence of astigmatism.
  • By age of occurrence:
    • congenital:
    • Early-acquired:
    • emerged at school age;
    • late acquired.
  • With the flow:
    • stationary;
    • slowly progressing;
    • rapidly progressing (more than 1 diopter per year).
  • By the presence of complications:
    • complicated;
    • uncomplicated.
  • According to the form and stage of the process with complications:
    • in shape (disk, macular (dry and moist), peripheral, widespread, vitreal, mixed);
    • by the stage of morphological changes (initial, developed, mixed);
    • at the stage of functional changes (I - visual acuity better than the seeing eye with the usual correction of 0.8-0.5, II - 0.4-0.3: III - 0.2-0.05, IV - 0.2-0.05 In this case, stage II and III correspond to the categories of the visually impaired, and IV - blindness).

In addition to true myopia, there are still different forms of pseudomyopia, or false myopia:

  • proper pseudo-myopia or spasm of accommodation;
  • night myopia or empty field myopia, by which is meant the shift of refraction toward the myopia in conditions of low illumination or non-oriented space, caused by the so-called dark focus of accommodation:
  • transient or induced myopia (caused by drugs, general or local pathological processes).

trusted-source[1], [2], [3], [4],

You are reporting a typo in the following text:
Simply click the "Send typo report" button to complete the report. You can also include a comment.