top of page

A constant to Lens Factor (LF) conversion for Barrett

Here is Lens Factor to corresponding A constant for Barrett Universal II. Earlier in video presentation,I have in detail explained about the concept of Lens Factor (LF). In that post I had explained that the Lens Factor, is the distance from the Iris plane to the second principal plane of the IOL. To understand more about what is second principal plane, a term derived from Gaussian Optics, please follow (

In the below table, you get an idea on the A constant to Lens Factor conversion.

To understand more about Lens Factor (LF) and Barrett Universal formula, please visit:

(Note :Suggested Guideline only. Please use your own judgement before applying. does not guarantee the accuracy of the conversion factor and is a suggestion only.)

bottom of page