Shortterm and longterm visual and astigmatic results of an opposing 10-0 nylon double running suture technique for penetrating keratoplasty.

Background: In ophthalmic surgery, corneal transplantation (penetrating keratoplasty) may be employed when the clarity of the cornea has been significantly compromised by conditions such as scarring, edema, and variable corneal thickness. Irregularities in corneal curvature can occur postoperatively. This astigmatism is of concern, because it can impair visual acuity despite an otherwise good surgical result.