1. J. E. SCOTT, Eye 6 (1992) 553.
2. E. A. BALAZS and J. L. DENLINGER, in ?The eye, Vol. Ia, Vegetative physiology and biochemistry?, edited by H. DAVSON, 3rd edition (Academic Press, New York, 1984) p. 533.
3. F. A. BETTELHEIM and T. J. Y. WANG, Exp. Eye Res. 23 (1976) 435.
4. C. L. SCHEPENS, Bull. Soc. Belge Opthal. 223-I (1987) 85.
5. M. DOI, in ?Materials science and technology, Vol. 12, Structure and properties of polymers?, edited by E. L. THOMAS (VCH, Weinheim, 1993) p. 389.