Figure 53
13.12.4 Post Refractive IOL calculation
In this section, you can calculate intraocular lenses also for patients who have undergone refractive surgery
to correct myopia or hyperopia by using the Camellin-Calossi formula and the Shammas no-history formula
(Figure 54).
These formulae are used with patients who have had prior refractive surgery. Each such patient is unique
and results may vary widely. You should interpret all IOL power recommendations with caution.
In this environment, you need to manually enter certain fundamental data.
Figure 54
The first is the surgeon who performs the operation. As in IOL calculation, the constants may differ from one
surgeon to another.
The second data is the "LT”, i.e. the crystalline lens thickness.
Next, select the correction type between the option shown below:
Myopic
Hyperopic
Unknown
If the correction type is unknown:
- it won’t be possible to select the surgery type
- It is not possible to choose the Shammas No-History formula
- to use the Camellin Calossi formula, you must insert in the Input Data the pachimetry values and the
optic zone diameter.
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