英语可以的自己看看吧，Todd对相关问题的回复，基本和群里逆转成功讲的大同小异
FAQ for visionimprovement by Hormetism
Posted 01 Mar 2016 in Uncategorized
Three of my most popular articles are about howto restore your eyesight naturally and liberate yourself from glasses orcontact lenses:
Myopia: a modern, yet reversible disease
Improve eyesight — and throw away your glasses
Rehabilitation
I call my general method “Hormetism” — theapplication of incremental stress to improve health. Whilethis approach has some similarities to other natural visionimprovement methods, what is unique here is how the method is organizedaround the central principle of applying graduated, incrementaldefocus stress to induce progressive improvement over time.
Hormetism is the precise opposite of thecurrent standard of care for correcting vision. Minus lenses areprescribed to provide immediate relief and “correct” a refractive error in theeye — usually a combination of axial lengthening and thickening or spasm of thecrystalline lens. But despite the immediate relief, this approachprovides a “crutch” that induces a compensation in the eye that makes themyopia grow worse over time. The method of Hormetism essentiallyreverses the process by using focusing techniques or plus lenses torestore the original shape of the eye and accommodative ability of thelens. The above linked blog posts delve into theory and experimentalevidence for my method.
Vision improvement byHormetism is also the single most popular topic on my Discussion Forum, and I’m so pleased to hear from manythat these articles have helped them to reduce or even eliminatetheir dependence on glasses — without resorting to laser eye surgery.
But I get a constant stream of questionsasking for clarifications about how to proceed. I often find myselfanswering the same questions again and again.
SoI’m writing this post to provide an “FAQ”: Answers to frequently asked“practical ” questions about how to apply this method to get results andimprove your vision. Ihave tried to boil it down to a simple, step-by-step method. Theinformation and ideas summarized here are based upon my personal experience,what has worked for others, and my understanding of the science of vision. I am not providing medical advice, so take responsibility for your ownhealth.
Q1. How do I start if I am myopic (nearsighted) and can focus close up,but the distance is blurry?
A1. Follow this five step process if youare myopic:
Note your Snellen score. First go to the ISEE Website and print out a Snellen chart. (That’s one of those eye charts you use in the doctor’s office or DMV to test your vision, like the one in the image below). Hang it on the wall in a well lit area and mark off a line 20 feet back from the wall. Cover each eye separately and note the lowest line for which you can correctly read all the letters.For example if it is Line 3 for your left eye and Line 4 for your right eye, your Snellen score is 20/70 (L) and 20/50 (R). The second number after the slash represents the distance that a normal person would have to stand at to see in focus the line that you can see at 20 feet back. Note that score, because it is your baseline against which to track improvement.
Note your diopter correction. This is the first number on your prescription, also called the spherical aberration. Ignore for now all the other numbers after the first — these relate to astigmatism or cylindrical aberration. (More about that later). OD is the right eye and OS is the left eye. So for example, if your prescription is
..
OD -3.00 -0,.50 x 95
OS -2.50 -1.00 x 93
..
Then your myopia can be summarized as:
..
-3.00/-2.50
..
What are diopters? Well, 100 divided by the minus diopter number is the approximate distance (in centimeters) that you can see clearly in focus with each eye. Since there are 39.4 inches per meter, then in inches that would be 39.4 divided by the diopters. So a person with the above prescription can see
..
39.4/3 = about 13 inches with the right eye
39.4/2.5 = about 16 inches with the left eye
..
Your Snellen score and diopter correction have different meanings, so you can’t translate from one to the other. However, if you don’t have your diopter correction, you may find this chart useful in making an approximate translation between Snellen and diopters.
..
..
Use print pushing to reduce myopia. Print pushing is a method that involves “active focusing”. It is not a matter of passively wearing special lenses. It requires conscientious awareness of the reach of your focus and an intentional effort to increase that reach by “nudging” it. If your myopia is stronger than -2 diopters or 20/150 in both eyes, then you cannot see normal print in focus beyond about 20 inches. So you can proceed to do “print pushing” without any glasses or contacts — just your naked eyes. The idea behind print pushing is to read right at the limit of your focal distance, and to systematically push that distance to become farther and farther away. Print pushing is something you integrate into your normal routine of reading printed matter or computer screens. About 5 years ago, I defined three distances to keep in mind while print pushing:
..
D1. The ‘edge of focus’ – the furthest distance for myope (or closest for a hyperope) where a printed letter is completely in focus
D2. The ‘edge of blur’ – the distance just beyond the edge of focus, where the slightest blur in the letter can just be detected
D3. The ‘edge of readability’ – the furthest distance where you can intelligibly recognize each letter.
..
Now D1 and D2 are going to be VERY close, almost exactly the same distance. If you are reading at D1, and you push the print slightly away less than an inch, you are immediately at D2. And if you are at D2 and get the tiniest distance closer, you are back at D1 again.You should spend the vast majority of your time reading at D1, in perfect focus, but continually (every few minutes), testing yourself by “pushing” into to D2. That’s because D1 is a dynamic distance, constantly changing. It depends on lighting conditions, how alter or tired you feel, and other factors. And you never want to be reading at D3 — that is needless stress on your eyes.The whole idea of print pushing is to keep increasing D1 and D2 so that your range of focus increases. Once your myopia weakens sufficiently, go to Step 4.
If your myopia is mild (less than about -2 diopters), you should print push with plus
lenses.
Once your myopia is -2 or less, you can easilyread a book or computer at arms’ length — at up to about 19-20 inches (half ameter) — without glasses. So you aren’t effectively increasing D1 and D2any more. That’s when you need to start using “anti-corrective” lenses to makeyour eyes work harder, by bring D1 and D2 closer. This is analogous towearing ankle weights to increase leg strength when you go for a run. This technique is sometimes known as “plus lens therapy”.Unlike minuslenses, which have concave curvature to “correct” myopia, plus lenses havea convex shape like a magnifying glass, making it easier to see objects upclose. But this also brings D2 closer, making it harder to focus in thedistance. And this is precisely what makes them useful for increasing D2beyond 20 inches.
..
Plus lenses are sometimes called reading glasses or “readers”, mainly to helppeople with hyperopia or presbyopia read with greater ease. But you aregoing to use them for the opposite purpose — for making it harder to focus inthe distance.To choose the right strength of plus lens, I recommend making atrip to your local pharmacy or department store, where these “readers” are soldon rotating racks, like those pictured to the right.Try on various pairs tofind one that allows you to read comfortably at about 15-20 inches, but beginsto blur beyond that. As a rule of thumb, your “effective” diopterswill be that of your current diopters minus thatof of the plus lens you wear. So if you have worked your way to a -0.75prescription, you’ll need to wear a +1.25 pair of reading glasses to make itseem like you have -2.00 diopter myopia. So try on the +1.25 pair to see howthat works.
..
Wear these reading glasses for at least part of the time you read each day. How much time? To be effective, I would say about 1-2 hours per daywhile reading. You can use them more if you are comfortable. Butrest is important, so it is very important to follow theseguidelines:
..
– Take frequent breaks every 15-30 minutes or so, removing the glasses to lookat objects near and far
– Stop if you get tired, or if your eyes get sore or red
– Use plus lenses only for reading and close work.
..
Plus lenses will create too much blur for distance activities. (See point5 below).As your myopia reduces, you will want to replace these plus lenseswith stronger plus lenses. Once you get higher than about +2.5, there isno need to go any higher.
..
Use under-correction for distance activities. When not reading or doing close work, you can provide further stimulus to myopia reversal by wearing slightly under-corrected glasses or contacts when at work, watching TV, sitting in lectures, or other distance viewing. This means ordering a pair of lenses that are about 0.25 to 0.5 diopters weaker than your original lenses. So to use the earlier example, for a starting of a prescription that reads:
..
OD -3.00 -0,.50 x 9
OS -2.50 -1.00 x 93
..
You would replace these with the following under-corrected prescription, changing only the first numbers and leaving the others alone:
..
OD -2.75 -0,.50 x 9
OS -2.25 -1.00 x 93
..
You wear these under-corrected lenses for a while (probably a few months) until your myopia is sufficiently reduced (by the combination of print pushing and wearing weaker distance lenses). Then you order additional lenses with further reductions in the diopter correction. When you are looking at distance objects, trace common objects with your eyes and observe fine features, especially lines and edges. Vary your gaze near and far, and make this into a game. Play with it!
..
Fusing of double images. As your myopia reduces, you may have the experience that many have of “double vision” or ghosting. This might seem alarming at first, but it is actually a sign of your ability to see objects more sharply! I suggest watching the video on my post “Myopia: a modern yet reversible disease” for a good description of how to use a technique I call “fusing” to take advantage of double images:
..
Find distant objects with sharp contrasting edges: telephone wires, tree branches, edges of buildings or signs
Focus on the darker of the double image and away from the fainter image. With time, the darker image will become darker, and the fainter image will fade away
Eventually the double image with fuse into a single crisp image — very exciting!
..
As your myopia reduces, you will start being able to see objects in perfect focus at increasing distances, even with your naked eye! This is where the technique really pays off and it is exciting and even emotional to experience this.
Q2. This all sounds great, but I have hyperopia (far sightedness) orpresbyopia (reduced accommodation of the crystalline lens) that make it hardfor me to read fine print or read up close? What can I do about that?
A2. Well, if you understand the principle ofhow Hormetism works to reduce myopia, you should be able to answer thatquestion if you think about it for a moment? What do you think the answeris? That’s right — it’s the same method applied in the oppositedirection!
When you read, insteadof print pushing do “print pulling”. Define D1, D2 and D3 by movinginward from perfect focus starting at D1. Generally you can print pullwith your naked eye. Get as close as you can to read at D1, and testyourself frequently by getting closer to the text. And try to testyourself on finer and finer print. You can also print out a near vision test card from the I-SEEwebsite It’s basically a Snellen chart for people with hyoperopia orpresbyopia. (It is on the final page of that link, after the standard Snellenchart for distance vision).
Another cool way toimprove near vision is to use the “convergence” method of Ray Gottieb. You can print out his chart and directions from the I-SEE Website. This is abit tricky and involves learning to allow your eyes to relax enough that they“cross” slightly. Not everyone can do this. It took me a while tomake it work for me, but once I got it it was like magic! Try it, it mayor may not work for you.
FAQ for visionimprovement by Hormetism
Posted 01 Mar 2016 in Uncategorized
Three of my most popular articles are about howto restore your eyesight naturally and liberate yourself from glasses orcontact lenses:
Myopia: a modern, yet reversible disease
Improve eyesight — and throw away your glasses
Rehabilitation
I call my general method “Hormetism” — theapplication of incremental stress to improve health. Whilethis approach has some similarities to other natural visionimprovement methods, what is unique here is how the method is organizedaround the central principle of applying graduated, incrementaldefocus stress to induce progressive improvement over time.
Hormetism is the precise opposite of thecurrent standard of care for correcting vision. Minus lenses areprescribed to provide immediate relief and “correct” a refractive error in theeye — usually a combination of axial lengthening and thickening or spasm of thecrystalline lens. But despite the immediate relief, this approachprovides a “crutch” that induces a compensation in the eye that makes themyopia grow worse over time. The method of Hormetism essentiallyreverses the process by using focusing techniques or plus lenses torestore the original shape of the eye and accommodative ability of thelens. The above linked blog posts delve into theory and experimentalevidence for my method.
Vision improvement byHormetism is also the single most popular topic on my Discussion Forum, and I’m so pleased to hear from manythat these articles have helped them to reduce or even eliminatetheir dependence on glasses — without resorting to laser eye surgery.
But I get a constant stream of questionsasking for clarifications about how to proceed. I often find myselfanswering the same questions again and again.
SoI’m writing this post to provide an “FAQ”: Answers to frequently asked“practical ” questions about how to apply this method to get results andimprove your vision. Ihave tried to boil it down to a simple, step-by-step method. Theinformation and ideas summarized here are based upon my personal experience,what has worked for others, and my understanding of the science of vision. I am not providing medical advice, so take responsibility for your ownhealth.
Q1. How do I start if I am myopic (nearsighted) and can focus close up,but the distance is blurry?
A1. Follow this five step process if youare myopic:
Note your Snellen score. First go to the ISEE Website and print out a Snellen chart. (That’s one of those eye charts you use in the doctor’s office or DMV to test your vision, like the one in the image below). Hang it on the wall in a well lit area and mark off a line 20 feet back from the wall. Cover each eye separately and note the lowest line for which you can correctly read all the letters.For example if it is Line 3 for your left eye and Line 4 for your right eye, your Snellen score is 20/70 (L) and 20/50 (R). The second number after the slash represents the distance that a normal person would have to stand at to see in focus the line that you can see at 20 feet back. Note that score, because it is your baseline against which to track improvement.
Note your diopter correction. This is the first number on your prescription, also called the spherical aberration. Ignore for now all the other numbers after the first — these relate to astigmatism or cylindrical aberration. (More about that later). OD is the right eye and OS is the left eye. So for example, if your prescription is
..
OD -3.00 -0,.50 x 95
OS -2.50 -1.00 x 93
..
Then your myopia can be summarized as:
..
-3.00/-2.50
..
What are diopters? Well, 100 divided by the minus diopter number is the approximate distance (in centimeters) that you can see clearly in focus with each eye. Since there are 39.4 inches per meter, then in inches that would be 39.4 divided by the diopters. So a person with the above prescription can see
..
39.4/3 = about 13 inches with the right eye
39.4/2.5 = about 16 inches with the left eye
..
Your Snellen score and diopter correction have different meanings, so you can’t translate from one to the other. However, if you don’t have your diopter correction, you may find this chart useful in making an approximate translation between Snellen and diopters.
..
..
Use print pushing to reduce myopia. Print pushing is a method that involves “active focusing”. It is not a matter of passively wearing special lenses. It requires conscientious awareness of the reach of your focus and an intentional effort to increase that reach by “nudging” it. If your myopia is stronger than -2 diopters or 20/150 in both eyes, then you cannot see normal print in focus beyond about 20 inches. So you can proceed to do “print pushing” without any glasses or contacts — just your naked eyes. The idea behind print pushing is to read right at the limit of your focal distance, and to systematically push that distance to become farther and farther away. Print pushing is something you integrate into your normal routine of reading printed matter or computer screens. About 5 years ago, I defined three distances to keep in mind while print pushing:
..
D1. The ‘edge of focus’ – the furthest distance for myope (or closest for a hyperope) where a printed letter is completely in focus
D2. The ‘edge of blur’ – the distance just beyond the edge of focus, where the slightest blur in the letter can just be detected
D3. The ‘edge of readability’ – the furthest distance where you can intelligibly recognize each letter.
..
Now D1 and D2 are going to be VERY close, almost exactly the same distance. If you are reading at D1, and you push the print slightly away less than an inch, you are immediately at D2. And if you are at D2 and get the tiniest distance closer, you are back at D1 again.You should spend the vast majority of your time reading at D1, in perfect focus, but continually (every few minutes), testing yourself by “pushing” into to D2. That’s because D1 is a dynamic distance, constantly changing. It depends on lighting conditions, how alter or tired you feel, and other factors. And you never want to be reading at D3 — that is needless stress on your eyes.The whole idea of print pushing is to keep increasing D1 and D2 so that your range of focus increases. Once your myopia weakens sufficiently, go to Step 4.
If your myopia is mild (less than about -2 diopters), you should print push with plus
lenses.
Once your myopia is -2 or less, you can easilyread a book or computer at arms’ length — at up to about 19-20 inches (half ameter) — without glasses. So you aren’t effectively increasing D1 and D2any more. That’s when you need to start using “anti-corrective” lenses to makeyour eyes work harder, by bring D1 and D2 closer. This is analogous towearing ankle weights to increase leg strength when you go for a run. This technique is sometimes known as “plus lens therapy”.Unlike minuslenses, which have concave curvature to “correct” myopia, plus lenses havea convex shape like a magnifying glass, making it easier to see objects upclose. But this also brings D2 closer, making it harder to focus in thedistance. And this is precisely what makes them useful for increasing D2beyond 20 inches.
..
Plus lenses are sometimes called reading glasses or “readers”, mainly to helppeople with hyperopia or presbyopia read with greater ease. But you aregoing to use them for the opposite purpose — for making it harder to focus inthe distance.To choose the right strength of plus lens, I recommend making atrip to your local pharmacy or department store, where these “readers” are soldon rotating racks, like those pictured to the right.Try on various pairs tofind one that allows you to read comfortably at about 15-20 inches, but beginsto blur beyond that. As a rule of thumb, your “effective” diopterswill be that of your current diopters minus thatof of the plus lens you wear. So if you have worked your way to a -0.75prescription, you’ll need to wear a +1.25 pair of reading glasses to make itseem like you have -2.00 diopter myopia. So try on the +1.25 pair to see howthat works.
..
Wear these reading glasses for at least part of the time you read each day. How much time? To be effective, I would say about 1-2 hours per daywhile reading. You can use them more if you are comfortable. Butrest is important, so it is very important to follow theseguidelines:
..
– Take frequent breaks every 15-30 minutes or so, removing the glasses to lookat objects near and far
– Stop if you get tired, or if your eyes get sore or red
– Use plus lenses only for reading and close work.
..
Plus lenses will create too much blur for distance activities. (See point5 below).As your myopia reduces, you will want to replace these plus lenseswith stronger plus lenses. Once you get higher than about +2.5, there isno need to go any higher.
..
Use under-correction for distance activities. When not reading or doing close work, you can provide further stimulus to myopia reversal by wearing slightly under-corrected glasses or contacts when at work, watching TV, sitting in lectures, or other distance viewing. This means ordering a pair of lenses that are about 0.25 to 0.5 diopters weaker than your original lenses. So to use the earlier example, for a starting of a prescription that reads:
..
OD -3.00 -0,.50 x 9
OS -2.50 -1.00 x 93
..
You would replace these with the following under-corrected prescription, changing only the first numbers and leaving the others alone:
..
OD -2.75 -0,.50 x 9
OS -2.25 -1.00 x 93
..
You wear these under-corrected lenses for a while (probably a few months) until your myopia is sufficiently reduced (by the combination of print pushing and wearing weaker distance lenses). Then you order additional lenses with further reductions in the diopter correction. When you are looking at distance objects, trace common objects with your eyes and observe fine features, especially lines and edges. Vary your gaze near and far, and make this into a game. Play with it!
..
Fusing of double images. As your myopia reduces, you may have the experience that many have of “double vision” or ghosting. This might seem alarming at first, but it is actually a sign of your ability to see objects more sharply! I suggest watching the video on my post “Myopia: a modern yet reversible disease” for a good description of how to use a technique I call “fusing” to take advantage of double images:
..
Find distant objects with sharp contrasting edges: telephone wires, tree branches, edges of buildings or signs
Focus on the darker of the double image and away from the fainter image. With time, the darker image will become darker, and the fainter image will fade away
Eventually the double image with fuse into a single crisp image — very exciting!
..
As your myopia reduces, you will start being able to see objects in perfect focus at increasing distances, even with your naked eye! This is where the technique really pays off and it is exciting and even emotional to experience this.
Q2. This all sounds great, but I have hyperopia (far sightedness) orpresbyopia (reduced accommodation of the crystalline lens) that make it hardfor me to read fine print or read up close? What can I do about that?
A2. Well, if you understand the principle ofhow Hormetism works to reduce myopia, you should be able to answer thatquestion if you think about it for a moment? What do you think the answeris? That’s right — it’s the same method applied in the oppositedirection!
When you read, insteadof print pushing do “print pulling”. Define D1, D2 and D3 by movinginward from perfect focus starting at D1. Generally you can print pullwith your naked eye. Get as close as you can to read at D1, and testyourself frequently by getting closer to the text. And try to testyourself on finer and finer print. You can also print out a near vision test card from the I-SEEwebsite It’s basically a Snellen chart for people with hyoperopia orpresbyopia. (It is on the final page of that link, after the standard Snellenchart for distance vision).
Another cool way toimprove near vision is to use the “convergence” method of Ray Gottieb. You can print out his chart and directions from the I-SEE Website. This is abit tricky and involves learning to allow your eyes to relax enough that they“cross” slightly. Not everyone can do this. It took me a while tomake it work for me, but once I got it it was like magic! Try it, it mayor may not work for you.
