| 摘要 |
Eyeglasses including a stationary frame and a lens frame mounted slidably on the stationary frame between an initial position in which each of interconnected pair of lenses of the lens frame is secured within a respective eyepiece of the stationary frame and an extended position in which the pair of lenses are in front of the eyepieces, and an actuator linearly displacing the lens frame between the normal and extended positions.
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