Original articleNoncontact corneal pachymetry with slit lamp-adapted optical coherence tomography
Section snippets
Patients and clinical examination
Prospectively, 108 patients (108 eyes) with normal (92 eyes) and pathologically altered corneas (16 eyes) were consecutively studied in a nonrandomized comparative clinical trial as part of their clinical examination in our department. The mean patient age was 66 ± 14 (mean ± SD) years (range, 25–87 years) with a male-female ratio of 55:53. Fifty-eight right and 50 left eyes were studied. A complete ophthalmologic examination was performed on each patient. The patient’s primary corneal
Results
The validation of the polyethylene test block sample thickness with OCT (n = 1.571) resulted in a mean value of 871 ± 6.7 μm (CV 0.77%) and with US (1950 ms−1) of 864 ± 14.3 μm (CV 1.66%), respectively. This confirmed that both instruments used in this study were able to accurately measure the true sample thickness within approximately 20 μm.
The corneal thickness could be reliably measured in all patients with slit lamp-adapted OCT. The mean geometric central corneal thickness values for OCT
Discussion
The representation of the corneal thickness is an important part of the ophthalmologic examination with the greatest demand for accurate thickness measurements in the field of refractive surgery. Ophthalmic biometry should provide rapid, objective, and accurate measurements of ocular dimensions. Optical coherence tomography is a high-resolution technique that can create precise cross-sectional images of the anterior and posterior eye segment.13, 14, 15, 16, 17, 18 The physical basis of imaging
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The authors have no commercial, proprietary, or financial interest in any research or devices described in the presented study.