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ASSORT Toric IOL Calculator

Welcome to the ASSORT Toric Calculator.

This online calculator allows the use of any type of toric intraocular lenses (IOL) commercially available.

Features of the ASSORT Toric calculator include:

  • Calculation of the Spherical Equivalent IOL using SRK/T, Holladay or Hoffer Q formulae.
  • Effective Lens Position (ELP) using A-constant, Surgeon Factor (SF) or pACD.
  • Spherical power of implant is factored into calculation of toric power of IOL at corneal plane.
  • Simple comprehension of calculations and display of required vectors.
  • Postoperative mathematical analyses for magnitude and axis of toric implant with refractive surprises.


These calculators allow astigmatism analysis of one eye only; group analyses are performed by purchasing the ASSORT or VECTrAK software