| 摘要 |
The device includes a diopter or focus-adjustable lens system (1) which focuses light beams reflected from objects or figures on which the eyes is fixed onto the retina, such that the focal point moves under dynamic control in a range including a short and precise distance in front of, in, and behind the retinal, to cause near and far accommodation of the eye of the patient. A visual field is provided into which the patient can look to see the dynamic optical focus range of the lens system.
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