Systems and methods for providing astigmatism correction

A method of determining an optical power of a toric lens to be surgically implanted in an eye of a patient by an incision made in the eye, the incision made along an incision axis, the method comprising:

• receiving a measurement related to pre-operative orientation of the steep meridian of the anterior cornea, the measurement obtained by an ophthalmic diagnostic device;
• obtaining a posterior corneal cylinder value indicative of the posterior corneal astigmatism;
• and
• calculating the optical power of the toric lens to be implanted in the eye of the patient based on the pre-operative steep meridian orientation and the posterior corneal cylinder value,
• wherein the method is performed by a processor executing instructions stored in a non-transitory computer medium to calculate the optical power of the toric lens.