HomeFeatures › Warpage Detection
Finds What Devices Miss

THE CORNEA THAT LIES TO YOUR TOPOGRAPHER.

Written by the RLES AI clinical rules team · Medically reviewed by Fırat Helvacıoğlu, MD · Alim Hüseynov, MD · Last updated: 19 August 2026

A cornea deformed by contact-lens wear can pass device screening as "Normal" — and an ablation planned on that surface treats a shape that will not exist in a few weeks. RLES AI screens nine warpage indicators together on every topography it reads.

NINE INDICATORS, READ AS ONE PATTERN

  • Surface asymmetry and zonal cylinder spread across the 3–7 mm zones, with axis rotation between zones
  • Apex-to-periphery curvature steps measured in diopters — and converted to microns of depression
  • Serial pachymetry drops: hypoxic stromal oedema resolving between visits
  • Repeatability failures between consecutive autorefractions and acquisitions

Two or more positive indicators trigger a structured contact-lens history interrogation — lens type, daily hours, sleeping in lenses, last removal — because patients rarely volunteer it.

THE OEDEMA TRAP THAT FLATTERS EVERY SAFETY NUMBER AT ONCE

Oedema-inflated pachymetry is the most dangerous finding of all: 25–30 extra microns of swollen stroma make PTA, RSB and RCT all look better simultaneously — three independent safety floors fooled by a single artefact. RLES AI flags the drop between serial measurements and insists on the lower, resolved value for planning.

PROOF, NOT ASSERTION: 3D RECONSTRUCTION

Every warpage analysis includes a three-panel 3D corneal surface reconstruction built from the map itself — shaded elevation, 3D surface and a measured meridian cross-section — so the surgeon sees the depression the flat map cannot convey. Whether the result is positive or clean, the reconstruction is included: negative findings deserve proof too. Planning resumes only after two consecutive concordant topographies confirm the surface is stable.[1]

DOCUMENTED CASE
A patient who slept in lenses for up to 15 days presented with corneas the device called "Normal" in both eyes. RLES AI flagged 7 of 9 indicators; after 15 days of surface therapy the maps normalised and the eyes became genuine surgical candidates.

FREQUENTLY ASKED QUESTIONS

What is contact-lens warpage?
A temporary deformation of the cornea caused by contact-lens wear that can mimic keratoconus[2] or hide the cornea’s true shape. RLES AI screens nine indicators on every topography it reads.
Why does warpage matter before laser surgery?
An ablation planned on a warped surface treats a shape that will not exist in a few weeks. RLES AI asks for lens history and two consecutive stable topographies before a plan is finalised.
SEE IT ON YOUR OWN CASES.
RLES AI runs as a mobile interface on your phone — nothing to install from a store, reports in minutes. The final clinical decision always rests with the surgeon.

Request Information
References — peer-reviewed sources
  1. Wang X, McCulley JP, Bowman RW, Cavanagh HD. Time to resolution of contact lens-induced corneal warpage prior to refractive surgery. CLAO J. 2002;28(4):169-71. doi:10.1097/01.ICL.0000018042.02034.AB PMID: 12394539
  2. Alipour F et al. Corneal Biomechanical Findings in Contact Lens Induced Corneal Warpage. J Ophthalmol. 2016;2016:5603763. doi:10.1155/2016/5603763 PMID: 27688908
Sources open on PubMed in a new tab.