Further Studies on Nucleic Acid Metabolism in the Lens* *From the Division of Ophthalmology, Department of Surgery, and the Department of Biochemistry, University of Rochester School of Medicine and Dentistry. This work was supported by U.S.P.H.S. research grant B-3081 and by Fight-for-Sight fellowships (Zigman and Sa'at). a portion of this study was performed at the Marine Bilogical Laboratory, Woods Hole, Massachusetts, supported in part by an M.B.L.-A.E.C. grant.