4 ms·

Near work hypothesis cannot explain way too many things, so current thinking is that it does contribute much to myopia. Consider, for example, very rapid rise o

• coldtea 11y ago
  >they did a lot of close work like sewing or working with skin in bad light without causing myopia Those involve close but shifting focus points. Not a static plane, like a screen.
  • fpoling 11y ago
    Currently there are no data that indicate that starring into close screen contributes to myopia alone. In fact if that hypothesis of lack of blue in indoor lighting that presumably makes it much harder for eye to focus is true, then starring under indoor lighting to the screen could be even protective as the screen has more blue light than a typical indoor light. In light of that (pun intended) one may need to be careful with twilight-like applications for smartphone that suppose to help with sleep by switching off blue pixels. It could be that while doing so they cause extra risk for myopia.
    • conceit 11y ago
      We have no data that muscles cannot hold a specific tension for a long time or that frequent monotonous strains can lead to malformation of the muscle? Sure, lack of blue light might also contribute, but the overall amount of blue in any artificial commodity lighting doesn't rival the sunlight.
      • fpoling 11y ago
        It is not the amount of light but rather spectral changes that may be responsible for myopia, http://iovs.arvojournals.org/article.aspx?articleid=2127682 http://iovs.arvojournals.org/article.aspx?articleid=2127682
      • fpoling 11y ago
        Also, eyes constantly do micro-movements even when one stares into the screen or looks at green fields or when one sleeps. They are more similar to heart in that respect than other muscles.