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.
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.
Dark adaptation
Light adaptation
Movement of eyes
Wear glasses just when necessary
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.

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

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.
