Five year study of astigmatic stability after cataract surgery with intraocular lens implantation: Comparison of wound sizes

Abstract

Wounds were not necessarily "stable" at 6 months. Larger wounds continued to shift years after surgery. Smaller wounds have significant postoperative advantages, but absolute long-term refractive stability may not be one.

Cataract surgery with toric intraocular lens implantation in patients with high corneal astigmatism

“…33 However, the exact amount of SIA is difficult to predict and is reported to depend on the amount of preoperative corneal astigmatism, the incision location and size, suture use, and patient age. [34][35][36] In our study, a temporal 2.2 mm incision induced a significantly lower amount of SIA than a superior 2.2 mm incision (À0.19 G 0.78 D at 7 G 15 degrees versus À0.40 G 0.60 D at 108 G 16 degrees; PZ.034). Previous studies indicate that 2.2 mm temporal incisions induce 0.10 to 0.31 D of SIA 37,38 versus 0.40 D for superior incisions.…”

Comparison of Surgically Induced Astigmatisms after Clear Corneal Incisions of Different Sizes

“…The incision is more than a port of access to the anterior chamber; it represents an important step of the operation, affecting ocular integrity and corneal stability 17. There are several benefits to using a small incision, including more rapid wound healing, less induced corneal distortion, and more control of the anterior chamber during surgery 2,4,7-9. The best incision for cataract surgery ensures no leakage and has minimal influence on corneal shape.…”

“…In addition, it is believed that a small incision induces less astigmatic change postoperatively 2,7-11. Small incision surgery shows rapid and stable optical recovery by preventing significant changes in corneal curvature.…”

Intraocular pressure changes during injection of microincision and conventional intraocular lenses through incisions smaller than 3.0 mm

“…Incisions for today's conventional IOLs produce astigmatism of approximately 1.00 D 20-28 ; however, an unsutured clear corneal wound of 2.0 mm is astigmatically neutral. 28 This knowledge has helped fuel the continuing efforts to design an IOL for MICS that can meet the biomechanical challenges of the IOL having an extremely thin optic. The high compressibility and resilience of hydrophilic acrylic materials have made them, so far, a favored choice for this type of IOL.…”