MAXIMUM TREATABLE CORRECTION
Tissue can be sufficient while optics are not. Enter K1 and K2 to see how much correction this cornea can carry before post-operative keratometry leaves the planning window.
Nothing is stored or transmitted — the calculation runs entirely in your browser. For professional use by eye surgeons; it is not a diagnosis and does not decide whether surgery may be performed. One number is not a plan: RLES AI audits about 300 items in a single laser case. See what one plan actually requires →
THE WINDOW AND WHY IT BINDS
Myopic ablation flattens the cornea by roughly 0.8 D for every diopter treated; hyperopic ablation steepens it about 1.0 D per diopter. RLES AI holds post-operative keratometry inside a planning window and derives the ceiling from it: maximum myopic correction is (K1 − 36) ÷ 0.8, maximum hyperopic correction is (49 − K2) ÷ 1.0. Keratometry outside that range has been associated with reduced optical quality — excessive flattening with optical distortion and ocular surface symptoms, excessive steepening with a topographic appearance that can mimic keratoconus.
THE CASE THAT SURPRISES EVERY SURGEON
A cornea with K1 at 40.0 D can carry only about −5.00 D — even at 600 µm of pachymetry. PTA, residual bed and residual corneal thickness all pass comfortably; the patient is nevertheless outside the plan. The limiting factor is not tissue but the optics of the cornea as a lens. The same applies in reverse at the steep end: a cornea with K2 at 46.5 D has roughly +2.50 D of hyperopic room.
WHAT HAPPENS AT THE CEILING
Reaching the ceiling is not the end of the conversation. Phakic ICL is the usual pathway for eyes eliminated by optics rather than by tissue, with its own indication ranges and its own anterior chamber depth question. See phakic ICL candidacy screening, or the full set of floors applied to every plan.
FREQUENTLY ASKED QUESTIONS
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.
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