Effect of Posterior Corneal Toricity on Refractive Outcome of Pseudophakia

Effect of Posterior Corneal Toricity on Refractive Outcome of Pseudophakia

This study is to evaluate the necessity of considering posterior corneal toricity on refractive outcome of patients with cataracts and corneal astigmatism after implantation of intraocular lenses.

This is determined by comparing total corneal and refractive astigmatism,and by comparing the expected refractive result with actual refractive astigmatism postoperatively,using total corneal and anterior corneal astigmatism to calculate respectively.

Inclusion Criteria:

• cataract candidates
• preoperative corneal regular astigmatism >0.75D
• Willing and able to complete all required postoperative visits
• Able to comprehend and sign a statement of informed consent

Exclusion Criteria:

• significant intraocular lenses tilt or decentration
• corneal scarring
• Irregular corneal astigmatism
• other ocular diseases
• surgical complication