I just heard of these helping to improve sight, help migraines and tension headaches and used by the Chinese for a very long time with great results. I wonder who may have used them or know someone who has. I read they can be so good that eye doctors try to put them down and cause trouble about the sales. I would love to hear anything anyone has to say about these. If they exercise the eyes to improve sight it seems worth a try. Is there a better place to purchase them I wonder. Any input appreciated.