Myopia can be thought of as an eyeball being too Vision RX 20 Review long for its focus. When light focuses in front of the retina instead of on the retina the image is fuzzy. Spectacle and contact lenses shift the focus back to where it belongs, which restores the sharpness of the image. But how does the image, in normal individuals, ever stay focused where it belongs as the child's eyes grow? Research shows that the eye has the means to adjust itself to the proper focus. This process is called emmetropization, and it is driven by a proper focus in the peripheral retina. That is, it only works well when the peripheral (off center) focus is not "over-focused".
Unfortunately, in many individuals, when the central "on-center" image is focused clearly (as when looking at the eye chart) the peripheral focus is "over-corrected"; the periphery of the lens is too strong. We now know that this causes an increase in the myopia. Traditional glasses and contact lenses have the same focus over the entire lens. Bifocal glasses have a different focus at the bottom of the lens for reading, but only at the bottom. There are special multifocal contact lenses that have the proper less strong focus 360 degrees around the lens. A recent study of 122 children showed that these lenses slowed the increase in myopia from -.50 diopters per year to -.03 diopters, an insignificant increase. But even though these lenses can slow down or even stop the increase in myopia, they cannot reverse a myopia that has already occurred.
The most exciting recent technology is orthokeratology - the means of using special eye molds to reshape the eye to the proper focus. They are only worn at night and removed during the day. There are some limits to the amount of correction that can be achieved, so it is best to start the treatment program before the myopia becomes too advanced. One of the most important senses for any organism, be it man or animal, is the sense of sight. It is one of the greatest tools of survival. Most people cannot even fathom having an impairment such as blindness. Therefore, it is hard to imagine that people do not take care of their eyes the way they should. It has become a wide belief that eye care only includes regular visits to the ophthalmologist and wearing a pair of spectacles if prescribed one. In extreme cases people are even ready to undergo expensive and risky eye surgery. What they need to realise is that much of this can be avoided with the use of daily vision improving eye exercises.