Pseudophakic Refraction Solver (Thin-Lens)

Vergence-based paraxial thin-lens model. Enter the required inputs and compute the selected variable. Units: AL, ELP in mm; corneal thickness (CCT) in µm; powers in D. Refractive index: n = 1.336. TCP is not entered: it is computed from SimK, K posterior, and CCT.

Variable to calculate

Rc (D)

AL (mm)

ELP (mm)

P (IOL power, D)

Cornea inputs (used to compute TCP)

SimK (D)

K posterior (D)

CCT / Pachymetry (µm)

K posterior entered as magnitude (force negative)

TCP (D) — computed

This TCP is used internally by the solver.

ELP solver bounds (only when solving ELP)

Bisection needs a plausible ELP bracket containing the solution.

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Result

Rc is at the corneal plane (contact-lens plane). Rc > 0 hyperopic, Rc < 0 myopic.