LIU, L. H. Measurement of the anterior segment of the eye using an improved slit lamp. Optics and Lasers in Biomedicine and Culture OWLS V. 2000, 264-266
NAKAO, S. Model of refractive indices in the human crystalline lens. Jpn. J. Clin. Ophthalmol. 1969, 23, 903-906
PIERSCIONEK, B. K. Refracive index gradient of human lens. Optom. Vis. Sci. 1989, 66, 822-829