We have come a long way from Sir Ridley implanting the first intraocular lens (IOL) in 1949, to Fiodorov's first theoretical vergence formula in 1967, reaching the more well-known 3rd generation formulas in the 90s. Subsequently, to the basic concept of biometry with classical measurements of axial length (AL) and keratometry (K), measurements of anterior chamber depth (ACD), effective lens position (ELP) and the optimization of IOL constants where added, reaching optimal results in conventional surgical situations. Currently, secondary to the technological development of premium IOLs, we faced the advent of 4th generation formulas such as the Barrett Suite or the Olsen ray tracing based formula. This, together with measurements made by interferometry or Swept Source OCT, allows us now to correct any refractive situation that arises.
Lecturer: Dr. Jose Mendoza, Ophthalmologist, Lima, Peru