RTVue Optical Coherence Tomography as an Imaging Modality for Scleral Thickness
Stephanie K. Cramer
Department of Ophthalmology, Oregon Health and Sciences University, Portland, OR, USA
Kristin Biggee
Department of Ophthalmology, Oregon Health and Sciences University, Portland, OR, USA
Robert Beardsley
Department of Ophthalmology, Oregon Health and Sciences University, Portland, OR, USA
Nicholas Schubach
Department of Ophthalmology, Oregon Health and Sciences University, Portland, OR, USA
Eric B. Suhler
Department of Ophthalmology, Oregon Health and Sciences University, Portland, OR, USA and Department of Ophthalmology, Portland Veterans Administration Medical Center, Portland OR, USA
Christina J. Flaxel *
Department of Ophthalmology, Oregon Health and Sciences University, Portland, OR, USA
*Author to whom correspondence should be addressed.
Abstract
Purpose: To examine RTVue (Optovue, Inc) optical coherence tomography (OCT) as a method for measuring scleral thickness.
Methods: A prospective, single-center study of eyes with a variety of ocular diseases (no scleral diseases) was performed to image scleral thickness utilizing the RTVue OCT. Repeated measurements of scleral thickness were performed using a line scan 3 mm from the limbus in the inferior nasal and inferior temporal quadrants of each eye. Obtained values were analyzed statistically.
Results: A total of 25 eyes in 14 subjects were measured. An average of 3 measurements per location per eye were taken. The mean scleral thickness 3 mm from the limbus was 654.22 µm. The average standard deviation of the measurements from each location was 30.88 µm. The boundary of the conjunctiva and sclera was easily distinguishable.
Conclusion: The results of this study suggest that RTVue high-resolution OCT is a user-friendly modality for measuring scleral thickness.
Keywords: Imaging, optical coherence tomography, scleral thickness