I deal with slab-off EXTREMELY infrequently, and we just had a dispense with a patient that went well in the office. But when she got home, she stated that on the OD lens, right at the line, she was seeing a "wave" or "distortion" effect in her TF reading area (I think it's the reading area, she was not very clear if it was reading or intermed). Is that typical with a lined trifocal with slab-off, where the pt would see a visual distortion? Rx as follows:

-4.00 -2.00 x 100 +2.75
+1.00 -0.75 x 090 +2.75

CR39 TFF7x28 Polarized

This patient is also crazy in that she had a TF set at FT height prior to this and requested "that we put it where it normally would go". So I'm not sure if this is because she doesn't like the TF too high, or if there's something with the lens geometry that she's seeing that I just don't have the experience to remember/check for