Cornea Astigmatism Correction with Scleral Flaps in Trans-scleral Suture-fixed Posterior Chamber Lens Implantation——A Preliminary Clinical Observation

马立威   王又冬   赵江月   张劲松

中国医科大学附属第四医院   中国医科大学眼科医院   辽宁省晶状体学重点实验室   110005
Purpose:To study the impact of the position of sclera flap，under which the posterior chamber intraocular lenses(PC-IOL)were sulcus-fixed by trans-scleral suture，on cornea astigmatism.

Patients and Methods：This prospective noncomparative case series comprised 26 aphakic or cataract eyes.The foldable PC-IOL was fixed in the sulcus by trans-scleral suture.The incision for IOL implantation was made 1mm posterior to limbus along the steepest meridian of cornea，while the scleral flaps to bury the knots of transscleral suture were made along the flattest meridian.

Results:the curvature along the steepest meridian changed from 44.25±2.22 preoperatively to 44.08±2.16 postoperatively(p>0.05，paired t-test)，the curvature along the flattest meridian changed from 41.24±2.21 preoperatively to 42.62±2.34 postoperatively(P<0.05，paired t-test)，and the surgery induced astigmatism(SIA)on the cornea was calculated by vector analysis，which was 1.40±0.99D.

Conclusions:the scleral flap made along the flattest meridian can steepen the cornea in certain degree，thus reduce the preexisting corneal astigmatism.