Type: Lazy Bed Prism Glasses. 1 X Lazy Bed Prism Glasses. - Use optical principle and materials, prism turns page 90°, help people easy to read books,watch TV or do other things while lying flat. - Can be set on a pair of myopic lens,fit for all people (Note:the myopic lens can't be too big) Strict material selection and precision processing,internal reflection prism equivalent in glass plate,so there is no influence to the user's vision.
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