IOLs & Calculations Resources
IOLs & Calculations Education
Explore the latest in IOLs and IOL calculations by selecting popular topics to the right, or click below to browse across all ASCRS resources on IOLs and IOL calculations.
Trending IOLs & Calculations Topics
Earn CME Credit: Refractive Options for Patients with Irregular Corneas
This activity will cover topography and tomography for at risk and irregular corneas, available refractive surgery options for patients with irregular corneas, advances in crosslinking, and strategies for patients with keratoconus.
Credits: By completing this activity you will earn 1.0 AMA PRA Category 1 Credit™.
Featured Presentation
Enjoy a taste of the 2025 ASCRS Annual Meeting to the right, "Lens Calculation and Grading" presented by Ryan G. Smith, MD. This presentation outlines the latest advancements in artificial intelligence in the area of IOL calculations.
ASCRS registrants have access to all of the 2025 ASCRS Annual Meeting sessions on-demand. Use the link below to browse the 200+ sessions.
In-Depth IOL Calculation Instructional Courses
View these in-depth courses on IOLs & Calculations from the 2025 and 2024 ASCRS Annual Meetings.
(2025 ASCRS Annual Meeting courses available to physicians registrants only)
IOLs & Calculations Paper Sessions
Explore hundreds of the latest papers in IOL calculations & technology from the 2025 Annual Meeting. (Registrants only)
Featured YES Webinar
Decision-making for pre-op: How to plan routine and complex refractive cataract surgery
Faculty: Eric Weinlander, MD; Kourtney Houser, MD; Kamran Riaz, MD; Ryan Smith, MD; Austin Nakatsuka, MD
This webinar will discuss how to turn challenging cataract cases into refractive surgery wins. Faculty will cover pre-operative planning for routine to complex cataract surgeries, with a focus on refractive considerations for monofocal and presbyopia-correcting lenses, how a refractive surgical approach can help in eyes with ocular co-morbidities, and what the latest technology can offer to improve surgical outcomes.
Barrett Toric Calculator
This calculator is intended to be used in conjunction with a comprehensive ophthalmic examination and the appropriate diagnostic tests and measurements necessary for cataract surgery candidates being considered for a Toric intraocular lens.
Hill-RBF Calculator
The Hill-RBF Calculator is an advanced, self-validating method for IOL power selection employing pattern recognition and sophisticated data interpolation. It has been optimized for use with the Haag-Streit LENSTAR, using optical biometry for all axial measurements and high density autokeratometry.
Post-Refractive IOL Calculator
This calculator facilitates IOL power calculation in eyes that have undergone LASIK/PRK/RK. The IOL Calculator is meant to serve as an adjunct tool to assist physicians in selecting the appropriate IOL for a particular patient.
