| 摘要 |
A pair of glasses for sustained close distance work includes a pair of integrated convex lens and stepped prism based-in. The thickness and weight of the lens will be reduced because it is made of optical resin and the prism is step shaped. The glasses can turn the near object light into the far object light, so that the eyestrain caused by sustained near work will be significantly reduced and the primary postnatal environment factor leading to myopia will be thoroughly eliminated <IMAGE> |
