penetrating keratoplasty

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Related to penetrating keratoplasty: Penetrating keratoplasty surgery

pen·e·trat·ing ker·a·to·plas·ty

corneal transplant with replacement of all layers of the cornea, but retaining the peripheral cornea.
Farlex Partner Medical Dictionary © Farlex 2012


Excision of corneal tissue and its replacement by a cornea from a human donor. This can be done either over the entire cornea (total keratoplasty) or over a portion of it (partial keratoplasty). Two main techniques are used: (1) the penetrating keratoplasty in which the entire thickness of the cornea is removed and replaced by transparent corneal tissue; (2) the lamellar keratoplasty in which a superficial layer is removed and replaced by healthy tissue. Common indications to perform keratoplasty are therapeutic (e.g. keratoconus, corneal ulcer) or cosmetic (e.g. removing an unsightly opacity). Syn. corneal transplant. See ciclosporin; granular dystrophy; eye bank; corneal graft; immunosuppressants.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Poon, "Long-term outcomes of deep anterior lamellar keratoplasty versus penetrating keratoplasty in Australian keratoconus patients," Cornea, vol.
Baratz, "Scattered light and visual function in a randomized trial of deep lamellar endothelial keratoplasty and penetrating keratoplasty," American Journal of Ophthalmology, vol.
During the follow-up period (over four months) the patient has shown an excellent recovery; his eye inflammation has been as expected for a penetrating keratoplasty, and no clinical signs of infection recurrence have been noted (Figure 6).
Acyclovir therapy in prevention of recurrent herpetic keratitis following penetrating keratoplasty. Am J Ophthalmol 2008;145:198-202.
Changing indications for penetrating keratoplasty: histopathology of 1,250 corneal buttons.
So, 40 cases were of Deep Anterior Lamellar Keratoplasty (DALK) by Big Bubble technique and their results were compared with 40 cases of penetrating Keratoplasty. All the cases were done by the same surgeon.
Eyes undergoing penetrating keratoplasty (PK) often have coexisting ocular pathologies which impede simultaneous intraocular lens (IOL) implantation.
A hospital based study from southern India has reported that corneal scarring was the most common indication for penetrating keratoplasty, half of which was due to keratitis.
Objectives: To compare clinical outcomes of cases who underwent deep anterior lamellar keratoplasty (DALK) and cases who were converted to penetrating keratoplasty (PKP) from DALK surgery.
The main advantage over penetrating keratoplasty is that it has virtually no effect on the corneal surface, thereby maintaining its natural shape and avoiding the potentially large refractive changes of corneal suturing (see Figure 6).
The surgical treatment was penetrating keratoplasty for 10 eyes and anterior lamellar keratoplasty for 7 eyes.