Vision Improvement Training Device with CD

This is from when I attended a vision recovery center.
My son used this when he was in elementary school.
The glasses have minor scratches, but I believe the instruction manual and the main vision recovery machine are in good condition.
The glasses are intentionally made to be difficult to see through.
The idea is that by trying to see the gaps in the rings with these glasses, it leads to vision recovery.
It's a training method where you look at the rings while listening to a CD and answer where the missing part of the ring is, thereby improving your vision.
The training method involves making the rings smaller in size with each repetition.

However, the contact for the switch of the lamp that you look at is faulty.
The lamps are turned on sequentially when answering the missing part of the ring.
Sometimes the lamp does not turn on smoothly when pressed.
Please understand this point before purchasing.
Everything except the switch part is in normal working order.
There are many unused parts.

I purchased this for over 100,000 yen.
I believe it is a well-made piece of equipment.

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