Intraocular lens power calculation after corneal refractive surgery: a comparison of ray-tracing method and thin-lens formulas

Purpose: (1) to find out whether ray-tracing method has a higher accuracy than thin-lens formulas for IOL calculation after corneal refractive surgery; (2) to find out the relation between pseudophakic ACD used in ray-tracing method and effective lens position (ELP) used in thin-lens formulas. Methods: 25 eyes after corneal refractive surgery (LASIK or PRK) were retrospectively studied. 15 eyes were implanted with AMO AR40e IOL in department of Ophthalmology University of Heidelberg, Germany. 10 eyes were implanted with Alcon SA60AT IOL in Department of Ophthalmology Guangdong Provincial Hospital, China. Corneal…