1. Intra-ocular acrylic lenses;Ridley;Trans Ophthalmol Soc UK,1951
2. Pitfalls in the determination of intraocular lens power without ultrasound;Binkhorst;Ophthalmic Surg,1976
3. Clinical prediction versus ultrasound measurement of IOL power;Clevenger;Am Intra-Ocular Implant Soc J,1978
4. Estimation of optical power of the intraocular lens;Fyodorov;Vestn Oftalmol,1967
5. Calculation of the optical power of intraocular lenses;Fyodorov;Invest Ophthalmol,1975