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Performing Calculations Calculate IOL Screen
and current K indexes and ask which one you want
associated with the entry.
Keratometer data can be entered in mm as well as
diopters. The ranges for these two units are mutually
exclusive. Values less than 20 are assumed to be mm,
values 20 or greater as assumed to be diopters. Units
are displayed with all entries. Diopter entries have a
keratometer index of refraction associated with them to
allow for conversion to mm as needed by some of the
formulas.
Enter the optical power of the cornea in diopters or mm,
as measured on a keratometer or corneal topographer,
as K1, K2.
To enter an K1, K2 values:
1. Within the Calculate IOL Screen, rotate the knob to
select the "K1" field, located in the middle right
side of the screen. Selection is indicated by a solid
black border.
2. Press the knob or the √ button, to activate the
field, indicated by the dashed border.
3. Within the K1 field, enter the K1 value or rotate the
knob until you arrive at the value.
4. Press the knob or the √ button, to save the
entered K1 value and to deactivate the field.
5. Enter the K2 value in the same manner.
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