34 lines
6.3 KiB
Markdown
34 lines
6.3 KiB
Markdown
---
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title: "Bates method"
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chunk: 1/4
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source: "https://en.wikipedia.org/wiki/Bates_method"
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category: "reference"
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tags: "science, encyclopedia"
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date_saved: "2026-05-05T09:17:19.108469+00:00"
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instance: "kb-cron"
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---
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The Bates method is an ineffective and potentially dangerous alternative therapy aimed at improving eyesight. Eye-care physician William Horatio Bates (1860–1931) held the erroneous belief that the extraocular muscles produced changes in focus and that "mental strain" caused abnormal action of these muscles; hence he believed that relieving such "strain" would cure defective vision. In 1952, optometry professor Elwin Marg wrote of Bates, "Most of his claims and almost all of his theories have been considered false by practically all visual scientists."
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No type of training has been shown to change the refractive power of the eye. Moreover, certain aspects of the Bates method can put its followers at risk: They may damage their eyes through overexposure to sunlight, not wear their corrective lenses when they need them (e.g., while driving), or neglect conventional eye care, possibly allowing serious conditions to develop.
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== Early history ==
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In 1891, Bates published an article in the New York Medical Journal claiming to have successfully reversed seven cases of nearsightedness, or myopia. In 1911, Bates published an article claiming to have taught myopic schoolchildren how to correctly focus in the distance. He recommended that schools post a Snellen chart in each classroom and encourage students to read it daily.
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In 1917, Bates teamed up with "'physical culture' faddist" Bernarr Macfadden on a "New Course of Eye Training" which was heavily advertised in the Physical Culture magazine. Bates' name was later dropped from the advertising, but Macfadden continued to market this correspondence course, which was renamed "Strengthening the Eyes". This course was criticized by the American Medical Association's Bureau of Investigation as dangerous quackery. In July 1919, Bates began publishing Better Eyesight, "A Monthly Magazine Devoted to the Prevention and Cure of Imperfect Sight Without Glasses". This was also criticized "as it were the product of a psychopathic ward".
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In 1920, Bates self-published a book, The Cure of Imperfect Sight by Treatment Without Glasses (or Perfect Sight Without Glasses). In 1926, articles by his assistant Emily Lierman were re-printed in a book titled Stories From the Clinic; some of these stories claimed that such methods had cured glaucoma and cataracts as well as refractive errors. In 1929, the Federal Trade Commission lodged a complaint against Bates for advertising "falsely or misleadingly".
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== Underlying concepts ==
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=== Accommodation ===
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Accommodation is the process by which the vertebrate eye adjusts optical power to maintain focus on the retina while the eye's gaze shifts to a point either closer or farther away. The long-standing medical consensus is that this is accomplished by action of the ciliary muscle, a muscle within the eye, which adjusts the curvature of the eye's crystalline lens. This explanation is based in the observed effect of atropine temporarily preventing accommodation when applied to the ciliary muscle, as well as images reflected on the crystalline lens becoming smaller as the eye shifts focus to a closer point, indicating a change in the lens' shape. Bates rejected this explanation, and in his 1920 book presented photographs that he said showed that the image remained the same size even as the eye shifted focus, concluding from this that the lens was not a factor in accommodation. However, optometrist Philip Pollack in a 1956 work characterized these photographs as "so blurred that it is impossible to tell whether one image is larger than the other", in contrast to later photographs that clearly showed a change in the size of the reflected images, just as had been observed since the late 19th century.
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Bates adhered to a different explanation of accommodation that had already been generally disregarded by the medical community of his time. Bates' model had the muscles surrounding the eyeball controlling its focus. In addition to their known function of turning the eye, Bates maintained, they also affect its shape, elongating the eyeball to focus at the near-point or shortening it to focus at a distance. Science author John Grant writes that many animals, such as fishes, accommodate by elongation of the eyeball, "it's just that humans aren't one of those animals."
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Laboratory tests have shown that the human eyeball is far too rigid to spontaneously change shape to a degree that would be necessary to accomplish what Bates described. Exceedingly small changes in axial length of the eyeball (18.6–19.2 μm) are caused by the action of the ciliary muscle during accommodation. However, these changes are far too small to account for the necessary changes in focus, producing changes of only −0.036 dioptres.
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=== Causes of sight problems ===
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Medical professionals characterize refractive errors as consequences of the eye's shape and other basic anatomy, which no evidence shows any exercise can alter. Bates, however, believed that these conditions are caused by tension of the muscles surrounding the eyeball, which he believed prevents the eyeball from sufficiently changing shape (per his explanation of accommodation) when gaze is shifted nearer or farther. Bates characterized this supposed muscular tension as the consequence of a "mental strain" to see, the relief of which he claimed would instantly improve sight. He also linked disturbances in the circulation of blood, which he said is "very largely influenced by thought", not only to refractive errors, but also to double vision, crossed-eye, lazy eye, and to more serious eye conditions such as cataracts and glaucoma. His therapies were based on these assumptions.
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Bates felt that corrective lenses, which he characterized as "eye crutches", are an impediment to curing poor vision. In his view, "strain" would increase as the eyes adjust to the correction in front of them. He thus recommended that glasses be discarded by anyone applying his method.
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== Treatments ==
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In his writings, Bates discussed several techniques that he claimed helped patients to improve their sight. These techniques were all supposed to relieve "strain" to which Bates attributed sight problems.
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=== Palming === |