Posts Tagged ‘myopia’

Myopia: a modern yet reversible disease

Posted 09 Aug 2014 — by Todd
Category Uncategorized

Here is the video and slide set from my presentation at the Ancestral Health Symposium, August 9, 2014, in Berkeley, California. I enjoyed meeting many of you who were at the conference.  I’d recommend watching the video first, and perhaps follow along with the uploaded slide set in a separate window, since it is  more convenient for viewing references and other details.

(Note: You’ll notice some minor differences in the video and slide versions, as the AV team inadvertently projected an earlier draft rather then the final slides I had provided).




Screen Shot 2014-08-09 at 8.45.47 PM


Overview of the talk.  For ease of reference, here is slide-by-slide “table-of-contents” summary of the presentation. People are always asking to provide a detailed explanation of exactly what steps to take to improve their vision.  You’ll find this bottom line “practical advice” in Slides 23-36

  1. Title: Myopia: a modern yet reversible disease
  2. My story:   I wore glasses from Grade 10 until 15 years ago. I don’t wear glasses any more!
  3. To reverse myopia, we need to first understand the causes.
  4. Myopia defined.   Myopia can lead to serious problems like cataracts and macular degeneration
  5. The prevalence of myopia has increased by 50-100% since 1970, across all age groups in the U.S.
  6. There is evidence for both genetic and environmental causes.
  7. An 1883 study of military recruits found myopia was much higher in students and merchants than farmers
  8. A 1969 study of Eskimos found that myopia had increased dramatically since Western schooling was introduced
  9. A 2012 study of German students found more than 50% of university graduates had myopia vs. 25% for dropouts
  10. In countries like Singapore and Taiwan, myopia is common among even young school children
  11. There is evidence that certain genes predispose to severe myopia. Copper deficiency induces myopia due to increased scleral wall elasticity.
  12. Cordain found that a high carbohydrate diet and deficiency of EFAs and minerals promote myopia
  13. It appears that a myopiagenic environment (near work) is needed to activate  genetic predisposition to myopia
  14. What is the biological mechanism?
  15. The normal lens changes shape to focus
  16. Myopia progresses in two stages: (1) near work induces lens spasm, causing pseudo-myopia; (2) use of minus lenses temporarily improves distance vision, but leads to eye elongation and axial myopia.  The result of elongation is a need to prescribe stronger minus lenses, in a vicious cycle of ever stronger lenses.
  17. Eye elongation is explained by the incremental retinal defocus theory.  Retinal defocus causes release of neuromodulators that lead to decreased scleral tissue integrity, and axial growth
  18. The IRD theory has been proven empirically in chicks, monkeys and humans using optical reflectometry
  19. How can myopia be reversed?
  20. First, it is useful to understand the framework of hormesis — the beneficial response to low dose stress
  21. Weight lifting is a good example of hormesis and the principle of Specific Adaptation to Imposed Demand
  22. What if gyms had the same business model as optometrists?  They would prescribe exoskeletons to help us walk, but these “crutches” would make us weaker, not stronger.  Lenses are crutches
  23. To reverse myopia with hormesis, we need to use active focus.  That means print pushing and plus lenses while reading, and progressively weaker minus lenses and image fusing for distance activities
  24. To embark on this journey, you must first determine how myopic you are, using a Snellen chart
  25. For print pushing, you need plus lenses only if your myopia is less than -2D. Otherwise use your naked eye
  26. Find the distance (D1) where print is at the edge of focus and (D2) where it starts to blur.  Read between D1 and D2
  27. Move back from your computer or book to stay between D1 and D2. Do this for 2-4 hours a day, taking frequent breaks.  Graduate to stronger plus lenses when you drop below 2D, and continue until you achieve 20/20 vision!
  28. For distance (walking, TV, movies, meetings) buy glasses with a 0.5D reduced prescription
  29. Once your vision gets better, you may notice “double vision” or ghosting.  This is a good sign and something you can use to improve your vision!
  30. Find distant objects with sharp contrasting edges: telephone wires, tree branches, edges of buildings or signs
  31. 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
  32. Eventually the double image with fuse into a single crisp image — very exciting!
  33. Most people have a weak eye and a stronger eye with less myopia.  The stronger eye will dominate, so strengthen the weaker eye by patching, shielding or winking shut the stronger eye…until the two eyes are roughly even.
  34. Frequently asked questions
  35. How much time should I spend on print pushing?  Spend 2-4 hours a day while doing routine computer work or reading. This is not a separate exercise, but something you build into daily activity
  36. How long before my vision improves?  Be patient — it’s like exercise or diet and won’t work overnight.  Expect some improvement within a few weeks, but it may take a year or more to clear your vision
  37. Is this the same as the Bates method?  Bates had some incorrect ideas about focusing, but his relaxation techniques can help reduce ciliary strain on the lens (pseduomyopia).  However, his method does not help if you have axial myopia and spend a lot of time at the computer or reading.  Print pushing specifically helps with that.
  38. Does active focus really work?  Check out my blog and forum for success stories
  39. And for the skeptical, here is a page of references on the epidemiology and causation of myopia
  40. And more references on methods and websites that provide a similar approach to mine
  41. Your eyes are adaptive organs which allowed them to become myopic, but you can use that same adaptability to reverse the process using active focus for both near and far activities
  42. Rediscover your natural vision — make it fun, make it a habit, make it a game.  You only have your glasses to lose!

Also be sure to check out these related posts and discussions:

How one person improved his vision

Posted 21 Apr 2012 — by Todd
Category Uncategorized

One of the articles on this blog that has garnered the most interest and generated the most comments–both here and on the Discussion Forum–concerns the use of plus lenses and threshold focusing in order to reverse myopia. In my post “Improve eyesight— and throw away your glasses“, and the accompanying page on “Rehabilitation“, I showed how the principles of Hormetism can be applied to restore visual acuity and eliminate the need to wear glasses — without the need for laser surgery or other artificial measures. In essence, reading or viewing “at the edge of focus” for extended intervals over a period of about a year will stimulate the eye to physically shorten, substantially reducing or eliminating myopia. In my post, I cited research supporting research for the Incremental Retinal Defocus Theory of myopia and its reversal.

The article has generated a lot of interest, but also some skepticism.  People who otherwise recognize that weight lifting can remodel muscles and diet can change metabolism fail to appreciate how the same principle of gradually applied stimulus can change the focal range of the eye. Since I wrote the article, many contributors to the Discussion Forum have chimed in with their progress, their questions, and their success stories.  Quite a few individuals have been able to significantly reduce the strength of their optical prescriptions.  In a few cases, they have been able to return to 20/20 vision, or better.

Sometimes real success stories can inspire us to try a new approach.  So I invited one of our Forum members, who goes by the screen name “Shadowfoot”, to share his story with you.

Read More

Improve eyesight – and throw away your glasses

Posted 05 Jul 2010 — by Todd
Category Rehabilitation

Are you tired of wearing glasses and disappointed that your prescription continues to get stronger every year?  It doesn’t have to be that way.  I was wearing progressively stronger lenses for my nearsightedness until ten years ago I accidentally stumbled upon a method that allowed me to acheive 20/20 vision and throw away my glasses within a year.  For the past decade I have not worn glasses or contacts, but I am able to drive, read, and see everything clearly and sharply.

The secret was learning how to actually change my eyes so that they could focus clearly on any objects — near or far, without wearing glasses.  The method I used is one of the best examples of the self-strengthening technique called Hormetism, the focus of my blog, which I’ve applied to improve my strength and resilience in many other areas.  This is not an infomercial: The method requires several weeks or months of diligent effort, with periodic followup, and results may vary. But for this relatively small investment of time and effort, you may consider the possibility of lasting freedom from prescription lenses to be worth investigating.  It worked for me and numerous others who have tried this approach. Read More