Considerations on the Castrop formula for calculation of intraocular lens power.
BackgroundTo explain the concept of the Castrop lens power calculation formula and show the application and results from a large dataset compared to classical formulae.MethodsThe Castrop vergence formula is based on a pseudophakic model eye with 4 refractive surfaces.This was compared against the SRKT, Hoffer-Q, Holladay1, simplified Haigis with 1