Blurry vision can have differing causes, for the most part, it has to do with the physical length of the eye being different than the optical length. In myopia (nearsightedness) the light falls short of the retina, because the eye is elongated, and in hyperopia (farsightedness) the light falls behind the retina because the eye is shortened. Neither glasses, contacts, nor lasik surgery reverse the elongation or shortening.
Not only do they not reverse the elongation or shortening… but consider the method of fitting lenses. They put lenses in front of you and ask “1 or 2” “2 or 1” and eventually you can get a prescription in .25 diopters given to you. Well, not given, you probably pay around $100-300 for the whole process. Are your eyes exactly requiring a -2.75 diopter correction? What if they only need a -2.70 correction? You will probably be given a -2.75 lens and told “you’ll get used to it.”
And get used to it you shall…
Your eyes will change based on the refraction provided to them… That means that the eyes will actually lengthen in order to “get used to it”.
Check out V and VI at the link page: http://vision.berkeley.edu/biomodule/News_Updates/Flash/Introtoeye.html
It shows how the eyes lengthen or shorten depending on which refraction is provided.
A further complication that happens is the fact that eyesight naturally fluctuates through various conditions and that the experience at the eye doctor itself is not conducive to clear eyesight. It is a stressful experience for many; it costs money, doctors are frequently rushing through, the chair is not comfortable, the machine that puffs air into your eye is not fun, it can be awkward in the dark room, and the experience of being tested in itself can be stressful.
Stress and strain have been shown to lead to blur vision. Incidents of great stress and strain can have direct effects on eyesight. Surveys show people frequently report have experienced at the end of some stressful day having more blurry vision than they started with and finding their vision restored by morning.
Research shows that normal eyes “grow” during the day and “shrink” at night. I put grow in quotation marks because I have not yet seen proof that it actually grows in size. I do believe that the eye is lengthening, but not sure there’s evidence that the volume changes. The take away point is clinical confirmation that eyesight fluctuates due to the length of the eye changing. This is vital because the way lenses and lasers manage blurry vision is by fixing a point to where light falls on the retina when the person is being tested, which is dangerous when the retina will move as the eye “grows” or “shrinks” shortens or elongates. This is why people are told not to get lasik surgery before their eyes “stop changing”… however, as the research shows, eyes change often.
The research also shows that, “Occluded eyes are shown to grow both during the day and the night.” (from wikipedia.org/myopia ) This means that muggy glasses or poor visual environments contribute to worsening vision by way of changing the shape of the eye. People are spending more time indoors looking up close and their eyesight is suffering. I do not think that spending time indoors causes blurry distance vision, but do think that being outdoors more can certainly help improve distance vision. The article shows that people with myopia spent an average of 3.7 hours less outdoors than people with clearer eyesight.
Lenses also alter the type of light that gets to the eyes. Not getting the natural unobstructed sunlight has also been shown to be problematic. Not getting light can happen both by spending less time outdoors and by wearing lenses.
Glasses, contacts, and lasik surgery are “management” techniques. They do not constitute healing at all and have been shown to cause problems – by definition they prevent healing.
There’s a difference between conditions or contingencies and causes. When people say a person is obese it wouldn’t be fair to say he is obese because he has so much weight. Well, it would be fair, but that would be defining the word obese, not explaining the cause of obesity. Just like if a person is sitting, the reason why they are sitting would not be because their bottom is on a chair, the reason would be, for example because they wish to be still and type and the computer is at the table by the chair.
So what is the cause of myopia? Well it’s fair to say the vision is blurry because the light does not fall on the retina. And it is fair to specify that the light does not fall because on the retina because the retina is elongated, but it is not satisfying as a cause, in my eyes.
I have personally seen intense sharpness and clarity of vision for an instant and then had my vision return to 20/400 or so. If you tell me the reason why I was myopic is because my eye is too long, that would not give me what I need to improve my eyesight, although that would make it clear that lenses or lasik surgery are not intelligent solutions to my problem because by knowing what myopia is, I can get a sense of what I want. I should want an eye that is not elongated and therefor the light falls on the retina naturally.
So how can a person get clear sight… to be continued.