Any more feedback on this lens a few months in here? Looking at ordering a pair for myself perhaps. Just curious to learn a bit more based on patient comments so far.
Any more feedback on this lens a few months in here? Looking at ordering a pair for myself perhaps. Just curious to learn a bit more based on patient comments so far.
Great success here, the only issue is really the marketing. Don't sell the Far to high add powers, unless they have a near option (computer lens, Surmount Progressive) but that goes with any distance emphasized lens. Very relaxing, I feel the difference at the end of the day.
One last question (I think...) based on the different designs (far, balanced, near) from having used other lenses that claimed this same sort of custom 'weighting' based on a pt's individual vision needs. I was left less than impressed with any of them. Do any of you good souls have direct experience fitting the different designs with success, and if so can you offer your own anecdotal evidence of which type of designs are giving you the most success with patient type A, B C, etc?
Tanks!
How does the corridor of the Superior Near compare to the Surmount?
Would you take the near PD and add how many mm to have the distance PD...?
Would you take the near PD and add how many mm to have the distance PD...? Or just order the lenses using the near PD... Years ago I took the near PD and added 2.5 mm ... to come up with the distance PD .. had great success since almost all non-adapts complain about reading alinement...
I'm wearing the distance priority version right now. It's the most comfortable PAL I've ever worn.
-4.50 ish OU w/2.00 Add
Hello bowtieman,
A standard of 2.5mm not accurate enough in most cases.
2.5mm might be the difference if the distance power on the horizontal meridian is close to zero, the PD is average (63), and the work distance is 35cm (14"), or the PD is very wide (>70mm) at a standard distance of 40cm. Moreover, any significant power on the horizontal will increase or decrease the convergence, requiring less inset for minus power, and more inset for plus powers.
The only way to get this right is to measure monocular distance PDs.
Here's a short cut for calculating insets due to work distance only.
If stop distance equals 27mm, the near multiplier for a work distance of...
40cm is .937
35cm is .928
30cm is .925
25cm is .903
20cm is .881
The formula is
NPD = DPD - DPD/1 + W(1/s - f/1000)
W is work distance in mm
s is the stop distance (average 27mm)
F is the focal power
I believe the common 2.5mm inset recommendation on PALs came from the very early Varilux lens designs where the typical work distance was considered to be 35cm.
Hope this helps,
Robert Martellaro
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
Has anyone compared the Seiko Superior Lens to the Shamir Autograph lll? How are they similar and how are they different? Is one lens truly better than the other? Thanks.
I've used both and certainly get more "WOW" from the superior.....but the turn time tends time but much, much longer than Auto III
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