So a patient comes in with a high minus Rx (I should have written it down to share, right? I forgot. :( ). Total power in each eye is around -5.00.
Patient was previously in polycarbonate lens without AR, 4.25 base.
Patient is now in High Index (1.67) with AR, 7 base. Patient is complaining about peripheral vision being 'blurry'. Vision is otherwise fine, and frame is only slightly wider than previous frame.
Now if I remember right - the higher the index, the base curve should go in the opposite direction if you are switching materials (i.e. high minus in poly would be a flatter curve than high index).
But this rule changes with aspheric lenses, right? I am unsure if the customer was previously in spherical poly or aspheric (customer went somewhere else before coming to us).
So the high index lens should be a steeper curve, correct?
What is the correct call in this situation? Put the customer back into a poly lens, but keep the AR (customer seemed very keen on the benefits of AR but the previous eyeglass hut apparently did not mention this) or maybe do a high index in a different base curve?
I'd really appreciate some feedback on this...
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