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About product and suppliers:
            4,031 auto refractor products are offered for sale by suppliers on Alibaba.com, of which other optics instruments accounts for 41%, medical optical instruments accounts for 40%, and telescope & binoculars accounts for 1%. 

A wide variety of auto refractor options are available to you, 

There are 3,605 suppliers who sells auto refractor on Alibaba.com, mainly located in Asia. The top countries of suppliers are India, China, and Indonesia, from which the percentage of auto refractor supply is 1%, 93%, and 3% respectively.