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Medical Forum / General / Vision / June 2005Do myopic humans have worse posture?
Do myopic humans have worse posture? >From an objective point of view this makes sense. A myope will lean foward, and, if their back is not straight, they will "slouch". This is yet another thing that is bad about myopia. I imagine that a hyperope will stick their chest out and raise they're shoulders with their back straight and bring back their head. Is this accurate? Or I will see myopes moving their head in different directions or tilting their head if they sit in the back of the room, obviously having a horrible time trying to see the board. Face it, this is why myopes are considered "nerds" and have "bad posture" while hyperopes are "manly", "bold", and "outgoing". Myopes, not being able to see anything are considered "shy". Once again, this is another case of the grass is greener on the other side. And guess what, it is greener on the hyperope's side. Do myopic humans have worse posture? >From an objective point of view this makes sense. A myope will lean foward, and, if their back is not straight, they will "slouch". This is yet another thing that is bad about myopia. I imagine that a hyperope will stick their chest out and raise they're shoulders with their back straight and bring back their head. Is this accurate? Or I will see myopes moving their head in different directions or tilting their head if they sit in the back of the room, obviously having a horrible time trying to see the board. Face it, this is why myopes are considered "nerds" and have "bad posture" while hyperopes are "manly", "bold", and "outgoing". Myopes, not being able to see anything are considered "shy". Once again, this is another case of the grass is greener on the other side. And guess what, it is greener on the hyperope's side. Ah, I see you are trying to be sly. I'll killfile *this* iteration of you, too . . . for not much extra effort. Bye-bye now... Dear Asian Friend, You make an excellent point. I would say it differently. Your average visual enviroment is simply the average (in diopters) of the things you look at -- i.e., the accommodation system adjusts for sharp focus on the retina, and necessarily had the power of the visual-enviroment. All things being equal (for arguments sake) then looking at "infinity", (assuming a refractiive state of zero or positive), the accommodation system will be zeron. If you look at 20 inches (-2 diopters) your accommodation system will be at +2 diopters. If you look at 4 inches (-10 diopters) your accommodation will be at +10 diopters. If you observe young children -- you will see SOME of them start to read at -2 diopters. Then very gradually SOME of them will lean forward until their nose is almost on the paper i.e., -10 diopters and even -13 diopters. (The young accommodation has this range of accommodation.) Other kids will sit up, and read at 20 inches (-2 dipoters). Continued over days and weeks, Assuming that they spend 8 hours reading and 8 hours "outside", the average for the nose-on-the page will be -5 diopters ( 0 - 10 ) / 2 and the "sit up" group will be - 1.0 diopters. ( 0 - 2) / 2 Thus the average visual enviroment is profoundly different. Since we know the NATURAL your primate eye controls its refractive state to it average visual enviroment, which group of children do you think will have their refractive state move from a positive value to a negative value in about two years? Make that a change from pseudo-hyperopia to pseudo-myopia for sake of argument. So understanding the above, "bad visual habits" can produce pseudo myopia. Best, Otis What does this have to do with posture? Are you saying that because of children's inherent posture, they naturally read at 10 diopters? And that is why they get myopia? I was trying to suggest that because people have myopia they're posture will deteriorate. Like for example right now I'm sitting hunched backed at my computer because I cannot see the screen if I lay bank on my chair. What I'm trying to say is that it's just a bitch to be nearsighted. My Asian Friend, Subject: What came first -- the chicken of the egg? It depends on what you mean by "poor posture". If you see a kid with his nose almost on the page -- would you call that "bad posture" or a bad visual-habit. The result on the accommodation is that it must adjust to -10 diopters (4 inches). You should read my site: www.myopiafree.com to see this. Hard to believe -- but true. This would explain this initial "step" into nearsighedness, and would place a lot of responsibility on the parents and child -- to stop the kid from this nose-on-the page routine. Let us be honest with ourselves. It is very possible that we (you and I) induce that first "phase" creating pseudo-myopia in ourselves. This would make us responsible for at least the "preventive" first step. understanding abou Enjoy, Otis |
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