The Optical-Coherence Tomographer is a precision instrument that uses an optical measurement known as low-coherence interferometry. The principle is much like that of ultrasound, except that light is used instead of sound. This difference permits measurement of tissue and distance resolved to the scale of 10 microns, versus the 200 microns with ultrasound.

The OCT delivers real-time, cross-sectional images of retinal tissue with an axial resolution of 10 microns or less. With OCT, practitioners can avoid more invasive diagnostic procedures and literally see below the surface of the retina. This provides direct measurement of internal retinal structures as an aid in the diagnosis of glaucoma and retinal diseases.

OCT allows practitioners to identify changes in the RNFL which can lead to early detection of glaucoma. And OCT provides for RNFL thickness, bilateral analysis and serial analysis.

OCT scans do not require dilation which increases patient compliance. Images and data for analysis are available instantly, in vivo, with no biohazard or blood-related risk.

OCT allows practitioners to perform accurate diagnosis and measurement of cystoid macular edema (CME), central serous retinopathy (CSR) and macular holes with cross-sectional scans of retinal thickness and in vivo histology of tissue. Diagnosis is further enabled by color-coded maps and retinal thickness in microns in nine map sectors.