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Diagnosis
Optical Coherence Tomography (OCT)
Optical Coherence Tomography (OCT)This OCT image shows a normal macula; in fact it is Morey’s (our chief photographer) macula! The dark area at the top is the vitreous; the layered structure between the vitreous and the orange-white band is the macula (center retina). This point of view is called a cross-section; it is similar to the types of images one gets from a CAT scan or MRI.
The OCT is a diagnostic imaging device that provides direct cross sectional images of the retina for objective measurement and subjective clinical evaluation in the detection of retinal diseases and glaucoma. The OCT images and analyzes macular thickness, the retinal nerve fiber layer and the optic disc using the latest technology for high resolution scans. 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 ≤ 10µm, versus the ≈ 200µm resolution with ultrasound. The instrument is crucial in the diagnosis of macular holes, macular edema and retinal traction.
Common Retinal Disorders
