We have a patient with a relatively high plus (+6.25 R, +7.50 L) for whom we made a pair of computer FT28s (add is +1.00). We used 1.6 high-index lenses. He got a large-ish frame, giving him a seg height of 21.5. He tells us that he has a slim ribbon of focus through the seg, giving him maybe 5-6 lines of type, and below that it blurs out. Any ideas what's going on? I suspect it has something to do with the power and resulting prism, but I'm not sure. Thanks for the help.
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