| 摘要 |
The present invention relates to instruments for myopia prevention in use for reading and writing, comprising a support (1), a once plane reflecting mirror (4), a quadratic plane reflecting mirror (11) and a visual hole (7). The once plane reflecting mirror (4) directly reflects the ray of the object in the visual field, and the total length of the optical path (S=S1+S2+S3) is greater than or equal to 300mm, but is less than 5000 mm. Lens or lenses group are installed at the eyeglass. This invention has broad eyeshot and strong suitability; using it, eyes will not fag easily, read-write is nature, work or study time can be prolong; it can prevent and cure myopia effectively, can enhance prevention and cure effect according to specific crowd or individual myopia degree and the viewing-object distance and angle of sight line can be modified. It is convenient and flexible, it can correct sitting gesture and prevent cervical vertebra disease. It is especially suitable to long-term short-distance read-write people. |
