Children's amblyopia training and treatment device, light and dark training device, vision recovery and correction device, light and dark amblyopia training device

The clear-viewing brand light and dark training instrument is a new type of special instrument that can be used in professional vision correction institutions in hospitals and families. Its basic principle is to use a special luminous body to use adjustable intensity light waves that are similar to natural sunlight for training. The ability of the eyes to respond to light and dark environments, thereby exercising the iris sphincter. Working principle of the light and dark training device
When we walk from a bright place to a dark place, our eyes will not be able to see anything for a while. It takes a while to It will slowly adapt and gradually see things in the dark. This process takes about ~ minutes to completely restore normal vision. During this adaptation process, the sensitivity of the retina gradually increases, which is dark adaptation, which is the ability of the retina to adapt to dark places. .
When we finish watching a movie and walk out of the cinema, under the bright sunshine, you will feel that the sun is dazzling and you can't open your eyes. It will take a while before you can see the surrounding scenery clearly. This process is just the opposite of dark adaptation. , called bright adaptation. The perception of strong light is the responsibility and function of cones, also known as photopic vision or daylight perception.
From a dark place to a bright place, under the stimulation of strong light, the cone cells in the retina immediately start working. At the beginning, there are only a few working cone cells, and the eye's sensitivity to light stimulation is still very high, so The light is dazzling and the surrounding scenery cannot be seen clearly. But in a short period of time, the cones are put into work, and the eye's sensitivity to light is reduced. At this time, it can adapt to strong light and see objects normally. Cone cells regenerate photopigment very quickly, and its regeneration process is opposite to the dark adaptation process of rod cells, that is, its sensitivity decreases with the increase of exposure time. Therefore, the sensitivity decreases rapidly in the first few seconds of light adaptation, and then slows down. , the adaptation process can be completed in about minutes.
Generally speaking, the visual function is optimal when the lighting conditions of the target are slightly higher than the level of light adaptation of the eyes. Produce good central vision including shape vision and color vision under light adaptation. Eyes that have been adjusted to a low-light environment and have adapted to them will be able to adapt quickly if they are exposed to extremely bright light in a very short period of time. However, after the flash exposure, the eyes will be at a very high level of light adaptation. state, and then return to a low-light environment, the visual function will be greatly reduced and may be temporarily lost. This temporary decrease in light sensitivity caused by high-intensity flashes is called flash blindness.
We all have this experience. When taking pictures in a room, the flash flashes in your eyes, and then you feel that everything is dark in front of you, and it takes a while before you can see the scenery clearly. The stronger the flash, the longer the recovery time. It takes more than half an hour for the sensitivity to return to normal.
Functions of the light and dark training device
Improve the softness and contraction ability of the pupillary sphincter dilator muscle and its amplification ability to solve the problem of slow reaction of cone cells. It has obvious auxiliary treatment effect on myopia and amblyopia.
Activate retinal photoreceptors and cones, stimulate the visual system, and improve iris responsiveness
Train the sensitivity of the reciprocal nerve, improve light adaptation and dark adaptation, and improve visual clarity
For myopia For those with vision loss and poor brain fusion, afterimage training can be implemented to improve brain fusion ability.
Training method
The trainer is required to stay close to the window and secure the headband with the headband. Keep training with your eyes open. No matter how strong the light is or how uncomfortable your eyes are, you must try to feel the stimulation of the light on your eyes.
Training time: minutes
Training posture: Sit with your eyes open and look directly at the light source, which has been atomized and will not dazzle your eyes.
It is required that the eye mask fit tightly and do not let outside light enter the eye mask.