Myopia - nearsightedness

In the 19th century myopia was very rare condition and described in the books of that time as strictly connected with the urban population and highly educated people. Many authors stated that myopia was not present in rural places and amongst “savages”.

With the introduction of the compulsory schooling and spreading literacy myopia rapidly progressed and scientist of that time developed the first theories about the causes of this trend.

In the era of digitalization myopia has progressed so much that in some countries such as South Korea reached 98% of young adults and in all developed countries of Asia over 80% has myopia.

Dramatic progression of myopia in Asian countries is shown in the next graphics (Source: Ian Morgan, Australian Natl Univ).

 

Myopia statistika

There are two causes of such effect:

  • close work which is progresivelly more demending and in the era of digitalization almost everybody is affected  regardless of the level of  education.
  • general widespread mistreatment by eye care professionals by not detecting and treating initial stage of pseudomyopia (false nearsightedness) with plus glasses in order to relieve accommodative strain but easily prescribing minus glasses and producing real axial myopia and in most cases overcorrecting myopia.

One thought on “Myopia - nearsightedness

  1. Mike says:

    I believe this axial elongation is caused by the over-correction of minus lenses. The lenses move the image back too far and the eye elongates as an adjustment to that requiring a new prescription to push the image back again. The lenses get stronger and stronger, so really, it’s the minus lenses that are causing axial elongation and progressive myopia.

    I would be interested in seeing any data that shows axial elongation occurring in people who have some degree of myopia that do not wear corrective lenses. My eyesight has gotten better just from not wearing glasses and am currently using minus lenses that are weaker than what my eyes need to reverse it since axial elongation goes both directions depending on the stimulus.

    Unfortunately, there’s a lot of money in selling people corrective lenses and most optometrists don’t have a clue what they are doing to people by prescribing lenses that are stronger than what is needed. It provides the wrong stimulus and the result is axial elongation and progressive myopia.

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