Some information I got regarding myopia from a local forum in China - Translated for you guys:)

I came across some information today from a local Chinese discussion group regarding the effects of using eyes at close range, he/she does not only focus on eyes, but consider the whole human body as a whole system, very interesting, so share with you guys.

First: let me put the original text here for those who can understand Chinese :grinning:

那么近距离用眼到底有哪些影响呢?
首先,是调节的调用,调节的持久调用会启动积分制的感应过程,当持续时间足够长时,刺激近视进展的信号将开始传递。
第二,近距离集合状态的压力,持续的眼外肌肉不对称压力,对幼儿眼球会产生塑形作用,偏向于扁长化。
第三,近距离用眼产生了交感神经和副交感神经兴奋的严重冲突和矛盾,持续注意力集中带来的交感神经兴奋,与看近时副交感神经兴奋以维持调节的努力相冲突,这种冲突导致,神经兴奋节律的紊乱化。
第四,持续近用眼的低头导致的眼压增加,呼吸暂停,血液二氧化碳浓度增加。
第五,持续近距离用眼时,眼底总体成像的周边远视离焦量倾向。
第六,持续近用眼对身体空间感知觉习惯的挑战,使得体态异常化,体态异常化进一步加剧近距离用眼对近视的促进作用。
第七,近距离用眼时,视觉整体更加模糊而不是清晰,引发形觉剥夺性的近视进展。
第八,持久近距离用眼后副交感神经过度兴奋导致的,暗焦点近移动,是近视发生前的普遍机制。
第九,持久近距离用眼,导致身体安静的时间太久,活动的时间太少,影响身体的整体健康,所谓久思伤脾,久视伤肝,通过破坏身体内在代谢节律引发近视化加速。
第十,由于近距离用眼书面工作,不可以使用高照明,长时间的暗光照明,会破坏视觉的光周期节律,从而引发近视进展。
不对近距离用眼做出干预的任何近视防控方案都是耍流氓。

So what are the effects of using eyes at close range?
First of all, it is the call of adjustment. The permanent call of adjustment will start the induction process of the integral system. When the duration is long enough, the signal that stimulates the progress of myopia will begin to be transmitted.
Second, the pressure of the close assembly state and the continuous asymmetrical pressure of the extraocular muscles will have a shaping effect on the eyeballs of young children, which tends to be prolate.
Third, using eyes at close range produces serious conflicts and contradictions between sympathetic nerve and parasympathetic nerve excitement. The sympathetic nerve excitement brought about by continuous attention is in conflict with the parasympathetic nerve excitement to maintain adjustment when looking close. As a result, the nerve excitement rhythm is disordered.
Fourth, the eye pressure, apnea, and blood carbon dioxide concentration increase due to continuous lowering of the eye.
Fifth, when the eyes are continuously used at close range, the overall image of the fundus tends to be defocused in peripheral hyperopia.
Sixth, the continuous challenge of using close eyes to the habit of perception of body space makes the posture abnormal, and the abnormal posture further intensifies the promotion effect of close eyes on myopia.
Seventh, when the eyes are used at close range, the overall vision is more blurred rather than clear, leading to the progression of form deprivation myopia.
Eighth, the parasympathetic nerve overexcited after prolonged close use of the eye causes the dark focus to move closer, which is a common mechanism before myopia occurs.
Ninth, long-term use of eyes at close range leads to too long a quiet time for the body and too little time for activity, which affects the overall health of the body. The so-called long-term thinking hurts the spleen and long-sightedness hurts the liver. It causes myopia to accelerate by disrupting the body’s internal metabolic rhythm .
Tenth, due to short-distance writing work with eyes, high illumination cannot be used. Long-term low-light illumination will destroy the rhythm of the light cycle of vision and cause the progression of myopia.
Any myopia prevention and control program that does not interfere with the use of eyes at close range is a hooliganism.

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Some very interesting ideas. Thank you for translating.

Thanks for posting this! You could state the last sentence a little differently and make it more idiomatic.

Any myopia prevention and control program that doesn’t intervene against overuse of the eyes at close range is criminal.

or even

Any myopia prevention and control program that doesn’t include “near use intervention” is criminal.

“Hooliganism” for 耍流氓 isn’t very idiomatic here. 做出干预 is really intervention rather than interference in this context.

Or, if we’re going to talk like 流氓 (gangsters) we could say “All that damn phone and computer use is screwing up your eyes! Put down the damn phone!” :slight_smile:

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Really interesting list.

We all know about smart phones and tablets being worse due to the smaller screen. I never considered the additional damage resulting from these not being in front of you like the TV screen or the work monitor. But I can easily imagine that one may also damage their eyesight by the constant angle of “looking down” on the screen.
Taking it all a step further I wonder if this bad habit of looking downwards is behind the increased cases of astigmatism. (@Salt mentioned astigmatism resulting from watching videos close up sideways, and others mentioned lights coming from a certain angle at their work area…)
Maybe the optos would prescribe less cyl if the Snellen chart was at 6 meters but at a 45 to 90 degree angle downwards? Like when you text on your smart phone while walking, or have the tablet on your lap and lights still arriving from the sun or the ceiling lights…

Would like to hear @jakey’s view on this additional idea around small screens.

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