| 摘要 |
Disclosed are loose glasses for persons with myopia and presbyopia to wear for a long time when looking at objects, and the glasses are single light concave lenses for presbyopia correction with a refractive power Dloose between the Dmust and the Dafter (including Dafter). Dloose refers to the refractive power of the loose glasses, Dmust refers to the necessarily fitted refractive power of the glasses, and Dafter refers to the refractive power of the last glasses in the glasses sequence used for basically seeing objects clearly when human eyes adjust in the state of relaxation. Long-time wearing of the loose glasses for a person with presbyopia for seeing objects can produce the effect of obtaining an increased visual clarity of the closely watched objects in the eye, and long-time wearing of the loose glasses for a person for seeing objects can produce the effect of reducing eye fatigue. |
