Journal of Clinical and Experimental Ophthalmology
Open Access
ISSN: 2155-9570
ISSN: 2155-9570
Wassef Amr
Cairo University, Egypt
Posters & Accepted Abstracts: J Clin Exp Ophthalmol
Purpose: To compare the obtainability and values of IOP measurements by Goldmann Applanation Tonometry (GAT) and Ocular Response Analyzer (ORA) before and aft er penetrating keratoplasty (PKP) testing the degree of their agreement and the impact of corneal biomechanical factors on IOP measurement. Patients & Method: Th e study is a comparative prospective study in which patients scheduled for penetrating keratoplasty (PKP) undergo intraocular pressure measurement (IOP) using the Ocular Response Analyzer (ORA) then the Goldman applanation tonometer (GAT), one day before surgery to be repeated one month aft er their surgery. Results: Forty (40) patients undergoing PKP were enrolled in the study, 28 males (70%) and 12 females (30%). Th e mean age of patients involved is 42.8�?±15.4, ranging between 9 and 75 years. Obtainability of ORA (92.5% of the patients) was signifi cantly higher than GAT (60%) postoperatively (p<0.001), while no signifi cant diff erence was elicited pre-operatively. Th e mean cornea corrected IOP (IOPcc) was signifi cantly higher than GAT and Goldmann related IOP (IOPg) both pre- and postoperatively. In addition, both mean IOPcc and GAT postoperatively (19.2�?±8.31, 15.65�?±6.99 mmHg respectively) were signifi cantly higher than their preoperative values (14.44�?±7.03, 11.78�?±4.55 mmHg, respectively). Strong correlations existed between GAT and ORA measurements both pre- and postoperatively. Th e level of agreement between GAT and IOPg was higher than IOPcc. Conclusion: ORA has proven to be superior to GAT in the ability to obtain reliable IOP measurements post PKP. IOPcc measurements also proved to be relevant, independent on corneal biomechanical factors (CH and CRF) but judging the accuracy of its values needs further large-scale studies.