Condition: 100% Brand New Item Type: Visual Convergence Training Tool Material: Plastic Purpose: Visual correction training equipment Usage: Principle: Use natural light spectrum and retinal imaging, according to the position and angle of view of red, yellow and green light in retinal imaging. The physiological diplopia function of the simulated eye, the virtual human eye is relaxed at a distance, and the collection is used when looking close, which effectively exercises the power of the eyes at a distance and a distance, and improves the range and level of the distance and distance.It corrects the external oblique state, improves the headache and eye bloating symptoms caused by excessive use, relieves the eye fatigue and discomfort, and makes the eyes healthier and more comfortable Stage 1: 1. The order of the tricolor balls should always keep the distance between the green, the furthest end, the yellow, the middle, the red, the near ball and the ball at 15-25 cm 2. The end of the scatter ball is tied to the door handle (or one person holds it at the height of the door handle) 3. The trainer holds the other end of the right hand to the bridgeof the nose 4.The yellow ball is 1 meter above the bridge of the nose and the child can look at the green ball at the same time and feel the yellow and red balls in the corner of the eye. 5. Both eyes look at the yellow ball at the same time and feel the green ball and the red ball in the corner of the eye. 6.Look at the red ball at the same time and feel the green and yellow balls out of the corner of your eye. If two green balls and two yellow balls appear, move on to the next training session Stage 2: Move the three balls to the bridge of the nose 50cm so that the yellow balls are 10 to 15 cm from the bridge of the nose Stage 3: Move the three balls to the bridge of the nose at the same time 25 cm so that the yellow balls are 5 to 10 cm away from the bridge of the nose Training method of internal inclination: Stage 1: 1. One end of the scatter ball is tied to the door handle (or one person holds it at the height of the door handle) 2. The trainer holds the other end of the right hand to the bridge of the nose and the distance between the ball and the ball is 5-10cm. 3. The yellow ball is 25cm from the bridge of the nose. Let the child look at the red ball at the same time 4. Look at the yellow balls at the same time and feel the green and red balls out of the corner of your eye. 5. Look at the green balls at the same time and feel the red and yellow balls out of the corner of your eye. Stage 2: Move the three balls to the other end 50 cm so that the yellow balls are 10 to 15 cm away from the bridge of the nose Stage 3: Move the three balls to the other end at the same time 25 cm so that the yellow balls are 1 meter above the bridge of the nose and 10-15 cm Package List 1 x Visual Convergence Training Tool 1Helps improve convergence insufficiency and strength sight focusing. 2Effectively promote convergence to corrects weak sight and strabismus. 3Light weight and compact size is easy to use and carry outdoor. 4Professional visual function correction training equipment. 5Made of quality beads and line, durable and convenient to use.