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Accutome A-Scan Plus User’s Guide
How to Set the K Index
The keratometer index of refraction, used to convert
corneal radius to diopter power is not the same for all
keratometers. In North America, most units have an
index of refraction of 1.3375. European keratometers
may have an index of refraction of 1.3315. The factory
default is 1.3375.
The K Index value is only used when entering
keratometer readings in diopters. K readings can be
entered on the Calculate IOL screen as well as the
Personalize IOL screen. The K index associated with
diopter entries is not explicitly shown. When a
keratometer reading is entered in diopters the default K
index is copied from the setup screen. If the K. index of
an entry is different than the Setup screen default K
Index, a * appears beside the entry. To change or view
the K index, change or reenter the diopter entry. The
Accutome A-Scan Plus will prompt you with the default
and current K indexes and ask which one you want
associated with the entry.
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