1.1.- Create a Subject

Subjects Layout -> Press over top plus button -> Introduce a pseudoidentifier -> Press Save button

The first step to use BigSIA is to insert the patient that will be operated on by means a pseudoidentifier. This is a number that identifies the subject in such a way only you will be able to identify the patient. The app does not save personal data to accomplish with data protection laws

SIA calculator

BigSIA

The incision that is required for IOL implantation during cataract surgery induces astigmatism —this is referred to as surgically induced astigmatism (SIA)— so the total amount of astigmatism to be corrected with the toric IOL must consider the flattening (FE) or steepening (SE) effect on the meridian of the preoperative corneal astigmatism on which the IOL is going to be aligned. The SIA will depend on several factors, including incision type, location and size, and its design or architecture. 

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