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Abstract #46734 Published in IGR 13-3
Ocular response analyzer to assess corneal biomechanical properties in exfoliation syndrome and exfoliative glaucoma
Cankaya AB; Anayol A; Ozcelik D; Demirdogen E; Yilmazbas PGraefe's Archive for Clinical and Experimental Ophthalmology 2011;
Background: The aim of this work was to investigate the differences in corneal biomechanical parameters between healthy and exfoliation syndrome (EXS) and exfoliative glaucoma (EXG) patients. Methods: Two hundred and forty-four eyes of 102 healthy, 64 EXS, and 78 EXG patients were included in the study. Corneal biomechanical parameters were measured using an ocular response analyzer (ORA). Central corneal thickness (CCT) was measured with an ultrasonic pachymeter. The differences in ORA parameters between study and control group participants were analyzed using Student's t test. Results: In healthy subjects, EXS and EXG eyes mean corneal hysteresis (CH) values were 9.4 (plus or minus) 1.4 mmHg, 8.5 (plus or minus) 1.5 mmHg and 6.9 (plus or minus) 2.1 mmHg, respectively. The difference in mean CH between the EXG and the other two groups were statistically significant (p < 0.01 for both comparisons). CH was significantly lower in EXS patients than that of healthy eyes (p < 0.001). Mean corneal resistance factor (CRF) values were 9.8 (plus or minus) 1.6 mmHg, 9.3 (plus or minus) 1.8 mmHg and 9.5 (plus or minus) 2.6 mmHg, respectively. Except for the difference between the control and EXS eyes (p = 0.004), no statistically significant difference was found between the groups in relation to mean CRF. There were no significant differences in CCT between the control eyes and exfoliative eyes with or without glaucoma. Conclusions: In this study, CH was found to be significantly lower in eyes with exfoliation. Further studies are needed to establish the relationships between exfoliation, ocular biomechanics, and glaucoma.
A.B. Cankaya. Mutlukent Mah. 1972. Sokak, Melis Sitesi, 3/15, Umitkoy, Cankaya, Ankara, 06800, Turkey.
Classification:
6.1.1 Devices, techniques (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)
9.4.4.1 Exfoliation syndrome (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders > 9.4.4 Glaucomas associated with disorders of the lens)
