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I. Donsoff, A. Kanellopoulos, L. Pe, M. Jankov, L. Sperber; Evaluation of an Ultrasonic Elasticity Measurement Device in Order to Diagnose and Manage Keratoconus . Invest. Ophthalmol. Vis. Sci. 2005;46(13):2745.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To evaluate the safety and sensitivity of a contact cornea elasticity measuring device in patients with keratoconus. Methods: 25 consecutive keratoconus patients were evaluated with standard central ultrasonic pachymetry and a new contact cornea elasticity measuring device. We evaluated visual acuity, orbscan topography, refraction, pachymetry, and elasticity and compared to an age matched control 25 eyes without keratoconus. Results: 25 eyes were included. The mean values were: refractive error: sphere: –3.80D (–0.50—6.75) and cylinder: –3.85D (1 to –8.75). UCVA 20/200. Ealsticity was measured as a mean 1.9 (1.2–2.5) units in the keratoconus group, compared to 0.9 (0.7–1.2) units in the normal control. There were 2 normal eyes with abnormally high elasticity. Conclusions: This measuring device appears to be safe in clinical use and appears to provide reproducible higher elasticity measurement in keratoconic corneas. Some "normal" corneas may have abnormal measurements.
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