Mustafa Onat

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PURPOSE To evaluate the data of penetrating keratoplasty over a 10-year period and to compare indications and outcomes of eyes undergoing single graft with those of eyes requiring regrafting. METHODS A total of 652 eyes of 613 patients required single graft (Group I). Sixty-one regrafts were performed on 53 eyes (Group II). The mean follow-up time was(More)
PURPOSE To investigate the prevalence of microbial keratitis, predisposing risk factors and treatment modalities in patients who developed keratitis following penetrating keratoplasty (PK). PATIENTS AND METHODS The records of 285 patients who had undergone PK between January 1991 and December 1995 in a tertiary care center were reviewed. Patients who(More)
PURPOSE To describe amniotic membrane transplantation indications and results at the authors' institution. METHODS In this study, chart review of 108 patients who underwent amniotic membrane transplantation between January 2002 and April 2006 was performed. The survival rate of corneal integrity was compared, using Kaplan-Meier survival analysis, as a(More)
PURPOSE To evaluate the efficacy of long-term and low-dose prophylactic oral acyclovir therapy in preventing the recurrence of herpetic infection and increasing graft survival in patients who undergo penetrating keratoplasty (PK) for herpes simplex keratitis (HSK). PATIENTS AND METHODS Nineteen patients were included in the study, who underwent PK for(More)
By a retrospective study of patients in the Ankara Hospital Eye Clinic, to determine the anatomical and visual results of therapeutic penetrating keratoplasty (PK) and its role in the management of corneal disease. Therapeutic PK was performed in 36 patients (37 eyes) who had corneal perforation due to corneal disease (23 eyes) or eyes in which perforation(More)
This study reports the outcomes of therapeutic penetrating keratoplasties, defined as keratoplasties performed to eradicate active infectious corneal diseases or to repair a structural defect of the cornea. The records of 24 eyes of 24 patients (17 female and 7 male) treated with therapeutic penetrating keratoplasty between 2002 and 2010 were evaluated(More)
Cellular Neural Networks (CNN) having parallel processing capabilities present important advantages in image processing applications. The coefficients of the template matrices and the threshold values of CNN should be optimized to obtain the desired output image. The learning algorithms designed for classical feed forward neural networks are not suitable(More)
The rolling element bearing is a key part in many mechanical facilities and the diagnosis of its faults is very important in the field of predictive maintenance. Till date, the resonant demodulation technique (envelope analysis) has been widely exploited in practice. In complex machines, the vibration generated by a component is easily affected by the(More)
In this study, drive and programming units of a dish washer, Bosch model SMS 9110, which consist of logic gates and relays, is redesigned. The washer is restructured to be microcontroller-based and is adapted to the intelligent room system in Digital Control Laboratory of Technical Education Faculty in Marmara University. A modular control algorithm is(More)