purpose: to report a case of recurrent keratoconus after penetrating keratoplasty (pk). patient and findings: a 31-year-old male patient who had undergone pk in his right eye for keratoconus 10 years ago presented with gradually decreased vision in the right eye. clinical, topographic, and histopathologic features of the cornea including irregular myopic astigmatism, central and paracentral cor...

purpose: to compare clinical outcomes of two methods of corneal transplantation, penetrating keratoplasty (pk) versus lamellar keratoplasty (lk), in patients with delayed-onset mustard gas keratitis (mgk). methods: in this retrospective, comparative, interventional case series, 78 eyes of 55 victims of chemical warfare with delayed-onset mustard gas keratopathy who underwent pk or lk were enrol...

purpose: to compare the outcomes of deep anterior lamellar keratoplasty (dalk) using the big-bubble technique with that of penetrating keratoplasty (pk) in patients with keratoconus. methods: this double-blind clinical trial included patients with moderate to advanced keratoconus and poor spectacle-corrected visual acuity or contact lens intolerance. refractive errors, best corrected visual acu...

Background: Keratoglobus is a rare noninflammatory corneal disorder characterized by diffuse corneal thinning and globular protrusion of the cornea. Surgical management of keratoglobus is challenging and the standard method has not yet been defined. Aim: To present the role of large penetrating keratoplasty (PK) in the management of keratoglobus. Case Presentation: A 29-year-old male patient wi...

D Anterior Lamellar Keratoplasty (DALK) over the last decade is rapidly becoming the preferred procedure of choice for pathologies of the cornea that do not involve the endothelium. DALK offers certain obvious advantages over Penetrating Keratoplasty (PK). As the donor endothelium is not replaced, the risk of endothelial rejection is negated and also obviates the need for long term steroid use....

Stromal disease (ectasia, opacities, scars, or melting) that occurs after penetrating keratoplasty (PK) can variously affect visual outcome.1,2 To date, even in the presence of healthy endothelium, this typeof complicationhasbeen treatedwith subsequentPK.3 Instead, the selective replacement of the diseased stroma by means of deep anterior lamellar keratoplasty (DALK) using pneumatic dissection ...

PURPOSE To compare corneal biomechanical properties following three different transplantation techniques, including Descemet stripping automated endothelial keratoplasty (DSAEK), deep anterior lamellar keratoplasty (DALK) and penetrating keratoplasty (PK) in comparison to normal eyes. METHODS This cross-sectional comparative study included 118 eyes: 17 eyes of 17 patients received DSAEK, 23 e...

BACKGROUND & OBJECTIVES Endothelial cells of the donor cornea are known to be affected quantitatively and qualitatively in different pathological conditions after penetrating keratoplasty (PK) and this has direct effect on the clarity of vision obtained after PK. This study was undertaken to analyze the qualitative and quantitative changes in donor endothelial cells before and after PK in diffe...