Tumbling the lens. * When a-chymotrypsin (Quimotrase, P.E.V.Y.A. Barcelona) for chemical zonulysis (Barraquer, 1958) is used, the zonular threads do not offer any resistance and no counter-pressure is required. This makes the procedure safer. a-Chymotrypsin has also been used at the Finsen Eye Department with great success. 75 copyright.
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