To determine whether histocompatibility matching of corneal transplant donors and recipients can reduce the incidence of graft rejection in high-risk patients.
Who can participate
Age range10 Years
SexALL
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Males and females age 10 years or older with two to four quadrants of corneal stroma vascularization or a history of allograft rejection in the eye considered for surgery were eligible for both studies in the CCTS.
Patients must have been willing to participate in 3 years of followup. No one was eligible for the CCTS who had a condition that would greatly increase the risk of nonrejection graft failure, such as xerophthalmia or severe exposure keratopathy. Also excluded were patients with systemic diseases or with medication usage that might alter their immune response.