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Richard J Kinch Richard J Kinch is offline
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Default Cataract Surgery

rigger writes:

Have you investigated the new models coming out
IIRC with some type of variable correction system?


Not variable, multi-focal. You see multiple superimposed images of the
world, each focused at a different distance. Of course, and this what they
will try not to tell you, you also see just as many multiple superimposed
UNfocused images. The idea is that your perception can sort out the
focused and unfocused information and selectively perceiving the focused
information and ignoring the unfocused. This is kind of like seeing
through a cataract to start with, where you have a focused image but
superimposed with a hazy glare, and you try to make the best of it.

Thus the multi-focal principle sacrifices acuity for convenience.

One also has to be skeptical as these are patented products being heavily
promoted at a multiple of the price of conventional IOLs.