Raza Ullah Khan, Mohammed Tariq Khan, Mahmood Saeed.
Visual outcome after penetrating keratoplasty.
J Sheikh Zayed Med Coll Jan ;1(3):94-5.

Background: Penetrating keratoplasty (PKP) is a surgical procedure in which surgical replacement of the host cornea with a donor cornea is performed. The term "allograft" is used if the donor is another person, and “autograft” if the tissue is taken from same subject. The important optical indications include keratoconus, corneal dystrophies, corneal degenerations, pseudophakic bullous keratopathy, corneal scarring and corneal opacities resulting from infective and non infective causes. Objectives: To evaluate visual outcome after penetrating keratoplasty (PKP). Patients and methods: This interventional, quasi-experimental study was conducted at corneal unit of Lyton Rehmatullah Benevolent Trust (LRBT) Eye Hospital Lahore from March 21st 2005 to January 21st 2007. 50 eyes of 50 patients were selected. Best corrected Visual acuity (BCVA) was checked and compared preoperatively and postoperatively with Snellen acuity charts. Results: 11 (22 %) treated eyes had visual acuity > 6/18, 32(64%) eyes had between 6/60 to 6/24 and 7(14%) eyes had < 6/60 at 12th month follow up. Graft rejection was noted in 2 (4%) eyes, cataract in 1 (2%) eye, glaucoma in 2 (4%) eyes, keratitis in 1 (2%) eye, endophthalmitis in 2 (4%) eyes, wound dehiscence in 3 (6%) eyes, astigmatism in 11(22%)eyes which was more than 5 (2%) diopters. Out of them, one developed keratoconus two years after surgery and amblyopia was found in 6 (12%) eyes post operatively. Conclusion: PKP is a good surgical procedure to restore visual acuity of selected patients with corneal opacities utilizing proper material and optimal surgical techniques.

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