Our eyes which are precious but we can careless about!
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IZON's Eye Exerciser

Principle of Eye Exerciser

Principle of Eye Exerciser

Light from a single point of a distant object and light from a single point of a near object being brought to a focus by changing the curvature of the lens. As you can see by this time, normally, in the emmetropia, the eye lens is thickened when you viewing near, and lighter far-away. Thus it is to bear the image fitting on the retina that the lens changes depending on the viewing distance. If focus does not fit, it certainly does not seem. Then How to make the lens thicken and thin? Because this is the muscle, called the ciliary muscle within the lens, that it change the lens to thin or thick with pulling, or releasing the muscle. As a result, when the eye which is emmetropia looks a distant place, it make lens thin with Ciliary Muscle pulling Ciliary zonule, thus a distant objec can be focused enough to seem.

눈의 구조

In other words, when you look far away, lens thin away as the Ciliary Muscle pull Ciliary zonule, it makes to focus looking object quite far away. Contrary, when you look close to see, lens thicker as the Ciliary Muscle pull Ciliary zonule, it makes to focus near. This is called the perspective control action of eyes. If eye is the state of emmetropia , this perspective is functioning well. This shape is due to muscle activity. So you can see near objects well, but it seems a distant place will look blurry. As the power weak that the ciliary muscle pull of ciliary body. the lens cannot be thin. Even now in Ophthalmology, because it seems that this ciliary muscle moved by the reflexively through the stimulation by the autonomic nerve center, the myopia caused by ciliary muscle tension cannot come back to normal, emmetropia, again is believed to be. However, through tenacity and brilliant research of authoritial professionals in the field in the developed countries,this theory is now completely collapsed. In other words, through clinical trials by animal experiments in anatomy, physiology, It was announced, < a ciliary muscle is under the control of the cerebral neocortex and limbic cortex. >. This opinion (of visual acuity activists) ,a strong commitment to see towards a certain target is become a nerve stimulation for us to relax unstable condition, and it is able to improvement or to restore again your reduced vision, that would have been proved. In other words, myopic vision can restore by training of the ciliary muscles, such as athletes exercise their bodies through training.

About light adaptation and dark adaptation

Dark adaptation

When people move to dark places from bright places, their light sense is poor at first and can’t see things emitting weak light well. In addition, rods work gradually and their light sense gets worse after one hour. In this case, the eyeball gets large so that light can go into the eye

Light adaptation

When people go to bright places again, a very short time of about 40 seconds to a minute is necessary for dark adaptation. In bright places, cones change into rods for working and the size of eyeball is properly adjusted to block light at the same time. This is called miosis.

movement of eyes

Our eyes are often likened to the camera. But in fact, it is that the camera was made out to mimic the eye. Eye has lens(IOL) in front of eyeball, corresponding to the film, where the retina and many nerve cells in the retina changes the light to signals and sends to the brain, the same as the camera. The center of the retina called the macula, located in the heart of the visual field is where you can see most clearly. It is the blind spot that the exit of the optic nerve a little on the inside of the right things.

As aperture(iris) is in front of the lens ,it control the right and the hole in the middle of the aperture as named the pupil, grows in dark places, is smaller in bright places. Cornea is a transparent membrane in front of the iris, which are to keep the lens. While attached to the outside of the eye, muscles (rectus and oblique muscles) is to help to play the role the eyes move to the direction of seeing , it has the function to tend towards the correct target the left and right sides of the eye.

If this activity is not normally, it become strabismus easier, and then it will be conducted in such conditions as 'astigmatism' which an object is visible in two or 'anisometropia' which the other eye is to degradation in susceptible, The camera lens is able to focus by moving back and forth, but eyes is able to focus by altering the thickness of the lens. Eye lens is unlikely with the camera lens, it has strong resilient. Around this lens, a lot of threads named ciliary zonule is pulling and then make thin of it.

The strain of this ciliary zonule is controlled by the muscle to named ciliary muscle. If this muscle is contracted to short, ciliary zonule is loosen and the lens is thicker, and if it is increased to long, the lens is lighter.

When you are viewing the distant landscape, lens is becoming lighter and focal length is becoming longer, but when you are viewing the shorter object, lens is becoming thicker and focal length is becoming shorter, Without regulation, it seems the most distant is called 'a far point' and then it seems strongly controlled by the nearest points is called 'a near point'.

Despite the young age, if you wear glasses with easy as having bad eyesight, you will wear more higher degree of lens. thus you should have to do your best to recovering the original eyes function.

  1. If you look at things with eyeglasses whose focus is fixed to see things afar, the focus good for looking at things afar but not good for looking at nearby things.

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  2. In the process of fixing the focus to look at nearby things, lenses tend to get thicker and near-sightedness progresses

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  3. If such a situation continues even a little more, you won't have a right for looking at things afar with the same lenses.
    therefore, if people with acquired near-sightedness, read books or stare at nearby objects for a long time, they should make it a habit to take off eyeglasses, in oder not to continuosly change lenses. Students in a growth period, in particulaar, except for adults should sufficiently understand the above principle and should know that their vision has gotten worse when they had to change lenses, not that power of glasses became weak.

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