IOL Calculator for Eyes with Prior RK
(Your data will not be saved.  Please print a copy for your record.)
Please enter all data available and press "Calculate"
Doctor Name Patient Name Patient ID
Eye IOL Model Target Ref(D)
Pre-RK  Data:
Refraction Sph(D) Cyl(D) Vertex (If empty, 12.5 mm will be used)
Post-RK Data:
Refraction Sph(D) Cyl(D) Vertex(mm)
Average Central Power*
Atlas Ring Values 1mm 2mm 3mm 4mm
Pentacam PWR_SF_Pupil_4.0 mm Zone** CT_MIN**
OCT (RTVue or Avanti XR Net Corneal Power Posterior Corneal Power Central Corneal Thickness
Optical/Ultrasound Biometric Data:
Ks K1(D) K2(D) Device Keratometric
Index (n)***
AL(mm) ACD(mm) Lens Thick (mm) WTW (mm)
Lens Constants*** A-cons (SRK/T) SF (Holladay1)
*Not SimK values; average central corneal powers from other devices.
**PWR_SF_Pupil_4.0 mm Zone refers to the Pentacam Power Distribution display for the Sagittal Curvature (Front) Mean (Km) value at a 4.0 mm zone and centered on the pupil. Click on PWR_SF_Pupil_4.0 mm Zone to see this topographic display. CT
_MIN is the minimum central corneal thickness in microns as displayed by the Pentacam.
***Enter the constant available; the
other will be calculated.  If ultrasonic AL is entered, be sure to use your ultrasound lens constants.