• Toric IOL calculation in keratoconus combined with Ahmed valve Description: This case demonstrates our in-house technique of IOL calculation in keratoconus patients. We actually use simulation of a topography-guided treatment for a 5 mm optical zone to determine the correct toric IOL axis and power.This specific case has the interesting aspect of combining a Ahmed Glaucoma valve implantation at its completion! Subspecialty: Cornea / External Disease Level: Intermediate Uploaded By: A. Kanellopoulos