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Precision tools for refractive surgery.

Interactive calculators, nomogram builders, simulators and informed-consent tools — developed by a surgeon and refined in daily clinical practice.

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Dr. med. Harald C. Gäckle
All apps by Dr. Harald C. Gäckle
Videos

See it in motion.

Refractive Planning Tools — the platform in 60 seconds.

Universal Phakic IOL Planner — sizing, vault prediction and planning in action.

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Fundamentals

Start here.

Corneal Refractive Planning

LASIK, SMILE & CLEAR.

Residual Stromal Bed Calculator

Instant residual stromal bed calculation for LASIK, SMILE and surface ablation — from pachymetry, flap or cap thickness and ablation depth, with immediate safety margin assessment.

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Tissue-Saving Ablation Model for Hyperopic Astigmatism

This app addresses hyperopic LASIK ablation profiles with astigmatism. Some manufacturers offer a tissue-saving mode — here you can simulate it and compare the ablation profiles of different laser manufacturers.

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The Cap–Residual-Stroma Trade-off in CLEAR / SMILE

Explore how cap thickness and lenticule geometry interact with residual stromal thickness in lenticule extraction — an interactive look at the biomechanical safety envelope.

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CLEAR Nomogram

Treatment refinement for CLEAR lenticule extraction — nomogram-based adjustment of spherical and cylindrical corrections for improved refractive accuracy.

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CLEAR Planner — Nomogram 14

Complete CLEAR treatment planning in one flow — photograph the Galilei printout, let SimK, pachymetry and year of birth be extracted automatically, verify the refraction and receive the nomogram-adjusted laser entry values. German-language interface.

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Corneal Biomechanics Simulator — PRK · FemtoLASIK · CLEAR

Same refractive effect, different force redistribution — an interactive model of load paths, depth-dependent stromal tensile strength and Laplace wall stress after PRK, FemtoLASIK and lenticule extraction, with adjustable IOP, WTW, asphericity and optical zone.

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FemtoLASIK

Flap planning.

Astigmatism Management

Incisional planning.

Cataract & IOL Surgery

Planning, documentation & counseling.

Nomogram Builders

Learn from your own outcomes.

Patient Counseling & Simulation

Seeing what the patient will see.

Decision Helper

Guided decision support for patients weighing their vision correction options — comparing laser surgery, lenticule extraction, phakic IOLs and lens exchange based on individual parameters.

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Glare & Halo Simulator

Realistic night-vision simulation of glare and halos — setting accurate patient expectations before refractive surgery or premium IOL implantation.

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ICL Light Ring Simulator

Interactive simulation of the light ring phenomenon after ICL implantation — helping patients understand and anticipate this optical side effect before surgery.

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Phakic IOL Decision & Sizing Helper

Interactive guide to posterior phakic IOLs (ICL/IPCL) — all models and variants, rule-based suitability assessment from ACD, WTW and endothelial data, manufacturer calculators compared, and postoperative vault classification. Includes a dynamic decision tree, structured case examples, quiz, complications overview, evidence grading and glossary.

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Universal Phakic IOL Planning & Comparison Tool

Educational platform comparing the sizing concepts and calculation approaches of different phakic IOL manufacturers in one application — enter biometric data and review sizing ranges, calculation parameters, planning philosophies and simulated vault predictions, with anatomical illustrations and interactive visualisations. For education, training, research and comparison only — not an official manufacturer calculator; results must always be checked against the official calculators, current IFUs and the surgeon's clinical judgment.

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Vision Correction Cost Calculator – Surgery Financing Calculator

Patient-facing lifetime cost comparison of glasses and contact lenses versus refractive surgery — showing the long-term economics of vision correction.

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IRIS — Refractive Counselling Chatbot

AI-powered patient counselling assistant covering all modern refractive procedures — LASIK, surface ablation, lenticule extraction, phakic IOLs and lens exchange. Answers questions in six languages (German, English, French, Spanish, Turkish and Kiswahili) with voice input and spoken responses, adjustable depth of explanation, and careful framing that always points back to the treating surgeon.

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Paediatrics & Strabismus

The young eye.