Vision Training Tool, Vision Therapy Tools, Eye Exercise Tools for Focus Training, Eye Convergence Exercises Card Therapy Device, One Set Japan_Batch_Two How to Use: 30 minutes

How to Use: 30 minutes to 1 hour before bedtime

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Vision Training Tool, Vision Therapy Tools, Eye Exercise Tools for Focus Training, Eye Convergence Exercises Card Therapy Device, One Set Japan_Batch_Two How to Use: 30 minutesVision Training Tool, Vision Therapy Tools, Eye Exercise Tools for Focus Training, Eye Convergence Exercises Card Therapy Device, One Set Product Features Package: 2 cards, 1 Guide rod, 1 manual. Available as opaque cards or as transparent targets silkscreened on transparent vinyl for fusional convergence and divergence reserve training. Training methods: Look at the closest line on the chart from 40 cm away, try to make the image fuse for 5 seconds,