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· Arousal · Hearing · Posture · Sleep · Vision
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The Cause of Internet and TV Addiction? www.causeof.org |
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Light Sensitivity
Sunning
Advantages and Disadvantages, Alternatives "It goes without saying that, whenever possible, sunglasses are to be avoided. After Bates training you are less likely to feel the need of them anyway, but if you ever do, a wide-brimmed hat or sunshade will probably give all the protection necessary. In temperate latitudes, sunglasses are usually only needed in conditions of exceptional glare (during prolonged exposure to sunlit snow, for example); in the tropics, however, and particularly for Caucasians and others whose forbears evolved in more temperate zones, sunglasses may be required more often. In these circumstances lenses of the best quality should be used. Cheap sunglasses, besides distorting the image, cannot be relied upon to give adequate protection from excessive ultraviolet radiation. (Page 51)" Book: Barnes, Jonathan. Improve Your Eyesight: A Guide to the Bates Method for Better Eyesight without Glasses. Souvenir Press, 1999.
Habitual Use "The person who needlessly wears sunglasses will habitually be using too few cones in his retina. In time he becomes so adapted to dim light that exposure to the sun results in discomfort or even pain. The effect this has on accurate vision will be appreciated when it is remembered that the fovea contains only cones. This type of photophobia is brought about simply by bad use. In the study of physiology there is an axiom which states: 'Use makes the organ', or, more succinctly put, 'Use it or lose it'. Later we will see that this applies not only to light/dark adaptation, but also to the other functions of the eye-including accommodation. (Page 27)" Book: Barnes, Jonathan. Improve Your Eyesight: A Guide to the Bates Method for Better Eyesight without Glasses. Souvenir Press, 1999.
Tinted Glasses I decided to have my glasses tinted, after leaning that their anti-glare lenses actually let _more_ light through than untreated glasses. I was told that letting more light through the lense is what reduces the glare.
Suprisingly, it only cost me $15.00 (USA) to have my glasses tinted, and it only took a few minutes to apply the tint.
The tint I chose was a light brown color. Some tints, such as light brown, are desirable because they very slightly alter the perception of color.
If you would like to learn more about lenses with tints, read the section 'Lenses with Tints' of the article: Color Lenses and Photochromics
Anti-Glare Screens If you're eyes become tired from overexposure to bright light you might want to buy an anti-glare screen, which you can attach to your computer monitor.
Changing Background Colors Eyestrain and flicker can also be reduced by changing the background colors of your computer applications from the color white, to a darker color, and making the text brighter if necessary. Instructions for Changing Background Colors in Microsoft Windows, Internet Explorer and Access
Functional Photophobia, Covering One Eye Covering one eyemay be helpful. For information about functional photophobia please see the Laterality suggestion or the Nutritional Optometry topic The Amblyopia and Convergence Insufficiency suggestions may also be helpful.
Sunlight Avoid too much sunlight. Exposure to some sunlight is good for your health, but too much sunlight can make your eyes tired, and can cause your brain to release endorphins. For more information about endorphins please visit the Research Topics page.
Sjögren’s Syndrome "According to the NIH, women are nine times more likely to have the disease, which often shows up after age 50…The bottom line is before seeking over-the-counter or prescription solutions your grandmother should check with her doctor."
"A lady with compound myopic astigmatism suffered from almost constant headaches which were very much worse when she took her glasses off, The theatre and the movies caused her so much discomfort that she feared to indulge in these recreations. She was told to take off her glasses and advised, among other things, to go to the movies; to look first at the corner of the screen, then off to the dark, then back to the screen a little nearer to the center, and so forth. She did so, and soon became able to look directly at the pictures without discomfort." Imagination Blindness: The Cure of Imperfect Sight by Treatment without Glasses
"If you are very light sensitive you may want to start [bates' sunning exercise] by closing your eyes and just facing into the sky but not directly at the sun. Note: At no time are you to open your eyes while looking at the sun!! This stimulates the rods and cones in your eye. Anytime I come out of a very dark place, like a movie theater, I do this exercise for about 20 seconds, and have no problem. I do not wear sunglasses anymore on a regular basis. I keep them handy for glare situations and only then when I'm wearing contact lenses which is not very often anymore" http://www.i-see.org/archive/sun
Contrast vs. Brightness If you are light sensitive, try setting the brightness and contrast as low as possible. If the lowest settings are too dark, adjust the contrast before adjusting the brightness. Adjusting the contrast is preferable to increasing the brightness. Contrast is the degree of difference between the lightest and darkest parts of a picture.
Adjusting LCD and CRT Monitors "LCDs do not suffer from any of the CRT afflictions to be discussed in the remainder of this note. For good LCD viewing, set brightness so that whites are displayed at a comfortable intensity. Then, set contrast so that blacks and whites are as distinct as possible - that is, so the displayed contrast ratio is sufficiently high." Reducing eyestrain from video and computer monitors
If your monitor is too dark, it may exacerbate eyestrain. But if your monitor is too bright it can aggravate conditions such as light sensitivity.
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