摘要 |
A PROGRESSIVE OPHTHALMIC LENS ELEMENT INCLUDING A LENS SURFACE HAVING AN UPPER VIEWING ZONE HAVING A SURFACE TO ACHIEVE A REFRACTING POWER CORRESPONDING TO DISTANCE VISION, A LOWER VIEWING ZONE HAVING A GREATER SURFACE POWER THAN THE UPPER VIEWING ZONE TO ACHIEVE A REFRACTING POWER CORRESPONDING TO NEAR VISION, AND AN INTERMEDIATE ZON EXTENDING ACROSS THE LENS ELEMENT HAVING A SURFACE POWER VARYING FROM THAT OF THE UPPER VIEWING ZONE TO THAT OF THE LOWER VIEWING ZONE AND INCLUDING A CORRIDOR OF RELATIVELY LOW SURFACE ASTIGMATISM, THE PROGRESSIVE OPHTHALMIC LENS ELEMENT INCLUDING PROGRESSIVE DESIGN ELEMENTS SELECTED TO REDUCE MYOPIA PROGRESSION. (FIG. 1)
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