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March 1991

Encroaching Lens Loops-Reply

Author Affiliations

Salt Lake City, Utah
Ogden, Utah

Arch Ophthalmol. 1991;109(3):316. doi:10.1001/archopht.1991.01080030018006

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In Reply.  —Dr Hoffersue that a one-piece PMMA PC IOL would avoid the problem of encroaching loops due to capsular fibrosis. Although many all-PMMA lenses are significantly stiffer and maintain their "memory"ch better than polypropylene, we still do not know the forces involved in capsular fibrosis. Therefore, it is too early to state that the problem would be totally eliminated by one-pieceses. It is also important to note the recent trend toward more flexible all-PMMAand so new lenses approach the flexibility of polypropylene loops. As a general rule, it is true that encroaching lens loops are generally polypropylene. It is also true, however, that polypropylene has been around much longer and the number of patient years of "in-IOLsh polypropylene loops is many times that of the all-PMMA Only time will tell which lens is better.

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