Post-LVC and post-RK cataract planning should start by documenting the refractive history, the availability of historical data, and the level of formula agreement. Standard K-based formulas alone are not enough.
Myopic LASIK and PRK alter the anterior corneal curvature and disrupt the assumptions behind standard keratometry. Radial keratotomy adds additional instability and diurnal variation. In these eyes, ordinary formula agreement can look reassuring even when the underlying corneal power is wrong. The planning workflow should therefore explicitly identify the refractive history before the surgeon interprets the IOL power result.
The first branch is simple: no prior corneal refractive surgery, prior LASIK/PRK, or prior RK. If LASIK, PRK, or RK is selected, IOLDx flags the case as a special pathway and adds a warning that standard K-based planning may be misleading.
Historical data changes which methods can be reviewed. In the planner, mark one of three states:
Use official calculators for the proprietary or specialty methods. IOLDx links directly to the relevant tools so the surgeon can verify the plan outside the transparent in-app formulas.
Post-LASIK, PRK, and RK pathway for IOL power calculation.
Open ASCRS calculatorBarrett True-K pathway for prior LASIK/PRK/RK eyes.
Open Barrett True-KPost-refractive toric planning when corneal astigmatism is part of the case.
Open True-K ToricReview SRK/T, Hoffer Q, Holladay 1, and Haigis side by side as a consistency check.
Open IOL PlannerFormula spread is not the final answer, but it is a safety signal. Tight agreement suggests internal consistency; wider disagreement should prompt repeat biometry, ocular surface review, topography/tomography review, and external post-refractive calculator comparison. In post-LVC eyes, even a narrow spread should still be interpreted cautiously because the corneal power input can remain biased.
A 2026 American Journal of Ophthalmology study by Cooke and colleagues compared no-history IOL power formulas in 3,738 post-myopic laser vision correction eyes, including approaches with and without posterior corneal curvature data. The practical lesson for PrecisionIOL is not to recreate proprietary formulas; it is to make the data state visible before the surgeon interprets confidence.
For post-LASIK and post-PRK eyes, the planning record should clearly show whether posterior corneal information, total keratometry, tomography, or other corneal power context is available. If it is missing, the plan should carry a no-history warning and route the surgeon to official post-refractive calculator verification.
Post-refractive patients often have higher expectations and may have more optical quality issues than routine cataract patients. Premium IOL planning should include explicit documentation of ocular surface status, topography regularity, higher-order aberrations, mesopic pupil size, glare/halo tolerance, and the possibility of residual refractive error.
ESCRS 2026 coverage of Tecnis PureSee EDOF outcomes in prior myopic laser vision correction eyes reinforces a practical shift: post-LASIK status should trigger stricter review rather than a reflexive "no premium IOL" rule. Ophthalmology Times reported functional outcomes and high spectacle independence in both prior-LVC and control groups, while also noting lower refractive predictability in the prior-LVC group: spherical equivalent prediction error within ±0.50 D was 93.2% in controls versus 77.6% in previous-LVC eyes.
The PrecisionIOL planning takeaway is to separate candidacy from confidence. A prior-LASIK or PRK patient may still deserve an EDOF or premium-IOL discussion, but only after the record clearly shows corneal regularity, ocular surface status, higher-order aberration context, posterior corneal data availability, formula spread, residual-refractive-error tolerance, and halo/night-driving counseling.
Open the planner, select LASIK/PRK or RK, mark historical-data status, and document formula spread before final verification.
Open IOL Planner