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Related Experiment Videos

Corneal grafts in the second eye.

A A Khodadoust, Y Karnema

    Cornea
    |January 1, 1984
    PubMed
    Summary

    Corneal transplantation in the second eye did not increase allograft rejection in patients with avascular grafts. However, patients with vascularized corneas experienced a twofold increase in rejection after a second corneal graft.

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    Area of Science:

    • Ophthalmology
    • Immunology

    Background:

    • Corneal transplantation is a common procedure for vision restoration.
    • Allograft rejection remains a significant complication, impacting graft survival.
    • The effect of bilateral grafting on rejection risk requires further investigation.

    Purpose of the Study:

    • To evaluate the incidence of allograft rejection after a second corneal graft in patients with bilateral penetrating keratoplasty.
    • To determine if pre-existing corneal vascularization influences rejection risk in the contralateral eye.

    Main Methods:

    • A retrospective study of 51 patients undergoing bilateral corneal grafts over 1-12 years.
    • Patients were stratified based on corneal graft vascularization (avascular vs. vascularized).
    • Incidence of allograft rejection was compared between first and second eye grafts.

    Main Results:

    • No significant increase in allograft rejection was observed after a second corneal graft in patients with avascular grafts (33 patients, 66 eyes).
    • A twofold increase in allograft rejection was noted in patients with vascularized corneas (18 patients, 36 eyes) for both first and second grafts.
    • Corneal vascularization appears to be a risk factor for increased rejection in bilateral corneal transplantation.

    Conclusions:

    • Bilateral corneal grafting in avascular corneas is generally safe regarding allograft rejection.
    • Corneal vascularization significantly increases the risk of allograft rejection after bilateral corneal transplantation.
    • Contraindications for second eye corneal grafting should be considered in patients with vascularized corneas.

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