Effect of On-Axis Incision on Surgically Induced Astigmatism Following Phacoemulsification Cataract Surgery.
A 2.75-mm on-axis limbal incision during phacoemulsification produces low and predictable SIA, a statistically significant reduction in corneal astigmatism and substantial improvement in visual acuity, which provides a practical, cost-neutral option for astigmatism management in cataract surgery.