I have a Zeiss Gradal Tops in 1.67 with -10.25 and -10.0, with an add of 1.0D. The lens has 18mm height. Very light astigmatism in the right eye.
Is it possible, assuming proper grinding of the lenses, that the center of the intermediate column would be optically superior to the center of the distance portion of the lenses?
In other words, the lab (apparently) cannot make the distance portion of the lenses such that the glasses will deliver the same or better distance acuity than does the intermediate column.
Seemingly, this is because the distance portion of the lenses contains more distortion than does the intermediate column.
Thus, we are left with the supposedly unavoidable oddity of having superior distance acuity through the intermediate column (the difference is slight but noticeable and the glasses have been carefully fit and adjusted by a top optician).
Might a new lab be in order?
Perhaps a different lens material?
What about a different lens manufacturer?
Any suggestions or explanations for this mystery would be greatly appreciated.
Cameron Reddy
creddy@cameronreddy.com
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