1. Standardized echography: basic principles, clinical application and results;Ossoinig, K.G.;Int Ophthalmol Clin,1979
2. Determination of the velocity of ultrasound Another factor is the technique of measuring the axial length. By ultrasound the 'axial length' reflects the distance from the corneal surface to the vitreoin the human lens and vitreous;Jansson, F.; Kock, E.;Acta Ophthalmol (Kbh)
3. A theoretical approach to IOL calculation using Gaussian optics;Olsen, T.;J Cataract Refract Surg,1987
4. Statistical methods in medical research;Armitage, P.,1977
5. Determination of intraocular lens power: a comparison with and without ultrasound;Kraff, M.C.; Sanders, D.R.; Lieberman, H.L.;Ophthalmic Surg,1978