Hoffer barrier ridge concept

References 

1. Vyas AV, Narendran R, Bacon PJ, Apple DJ. Three-hundred-sixty degree barrier effect of a square-edged and an enhanced-edge intraocular lens on centripetal lens epithelial cell migration; two-year results. J Cataract Refract Surg. 2007;33:81–87
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2. Hoffer KJ. Ridged intraocular lens may lower need for discissions after cataract surgery. Ophthalmology Times. April 1981;6(4):4
3. Hoffer KJ. Glare not caused by ridge. [letter] J Cataract Refract Surg. 1990;16:130–131
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4. Hoffer KJ. Five years' experience with the ridged laser lens implant. In:  Emery JM,  Jacobson AC editor. Current Concepts in Cataract Surgery; Selected Proceedings of the Eighth Biennial Cataract Surgical Congress. Norwalk, CT: Appleton-Century-Crofts; 1984;p. 296–299