IOL Exchange GOD MODE

Refractive-surprise command center: exact per-meridian vergence solving, full vector toric planning, Monte Carlo outcome prediction - all live, all in your browser.

Exact raytrace vergence (no first-order approximations) Per-meridian toric solve Monte Carlo outcomes Exchange vs rotation duel Zero dependencies

Engineered for Dr. Abdel Rahman Abuzaid · Oculoplastic & Refractive Surgery Paolo · Oculoplasty AI

1 · Distances

Spectacle vertex distance (mm)

Cornea–IOL distance, ELP (mm)

Measured or biometry-estimated ELP of the in-situ IOL. The replacement ELP shifts by the A-constant difference below.

2 · Keratometry & cornea

K1 flat (D)

K1 axis (°)

K2 steep (D)

Posterior cornea model

Surgical-induced astigmatism (D)

SIA axis (°)

3 · Current IOL (the surprise)

Non-toric Toric

Sphere Ps (D)

Toric cylinder Pc (D, IOL plane)

IOL axis Ai (°)

A-constant (current)

Axial length AL (mm)

AL + measured refraction let the engine invert the eye's true residual axial demand - no assumed formula constant beyond what you give it.

4 · Measured post-op refraction

Sphere S (D)

Cylinder C (±)

Axis (°)

5 · Target refraction

Sphere S (D)

Cylinder C (±)

Axis (°)

6 · Replacement IOL

Non-toric Toric

A-constant (replacement)

Round sphere (D)

Round cylinder (D)

Monte Carlo draws

ELP prediction σ (mm)

Toric rotation σ (°)

Refraction noise σ (D)

Exchange sphere Ps

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Toric cylinder

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P(|SE| ≤ 0.5 D)

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P(|SE| ≤ 1.0 D)

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Schematic eye · focal outcome (live)

Monte Carlo outcome distribution · post-op spherical equivalent

Astigmatism battlefield · double-angle vector plot

Exchange vs best rotation of the in-situ toric IOL

Sensitivity scan · replacement sphere Ps

Decision support for eye-care professionals. Exact per-meridian paraxial vergence model of the pseudophakic eye (two-meridian reduced eye, n = 1.336); ELP shift from the SRK/T A-constant relation (ΔELP ≈ 0.62467·ΔA); positional refractive effect carried exactly by vergence propagation rather than first-order terms. Monte Carlo samples ELP prediction error, toric misalignment and refraction noise. References: Gatinel et al., J Cataract Refract Surg 2025;51(6):488-495 · Am J Ophthalmol 2023;253:65-73 · Transl Vis Sci Technol 2023;12(11):11. Not a medical device; all computation local.