Examination of the accuracy of toric predictive power in patients with 1.5 diopters of astigmatism or less.

Based on preoperative keratometry and using the Baylor Nomogram and a standard factor for surgically-induced astigmatism, the investigators will calculate "keratometry-based total astigmatism" for each patient. This will be compared to "aberrometry-based total astigmatism", i.e. the total astigmatism measured by ORA in each case. With this information the investigators will determine in what portion of patients keratometry-based total astigmatism vs aberrometry-based total astigmatism predicts a need for astigmatism correction, (i.e., total astigmatism is greater than or equal to 0.5 D) during cataract surgery.

Inclusion Criteria:

• Patients who underwent conventional (non-femtosecond) cataract surgery and whose "data to be collected" are accessible and available from the ORA database.
• Patients whose medical records show they did not exhibit any significant ocular morbidity that would be expected to influence outcome measures.

Exclusion Criteria:

• Patients with visually significant co-morbidities (corneal, retina, optic nerve disease) that could affect their visual outcome or ability to be refracted after.
• Patients with surgical complications either during or after surgery (capsule tears, iris trauma, decentered IOL, cystoid macular edema, etc.)
• Patients with previous refractive surgery.