Optical Coherence Tomography (OCT)

Optical coherence tomography (Optical Coherence Tomography, OCT) is an imaging technology developed rapidly in the past decade. It uses the basic principle of weak coherent optical interferometer to detect different depth layers of biological tissue and face the incident weak coherence. The back reflection of light or several scattered signals can be scanned to obtain a two-dimensional or three-dimensional structure image of biological tissue. Basic Information Specialist Category: Ophthalmic Examination Category: Other Inspections Applicable gender: whether men and women apply fasting: not fasting Tips: Listen carefully to the doctor's arrangements. Normal value The retinal thickness map of the posterior pole of normal people is horseshoe-shaped, symmetrical upper and lower, and the nasal retina is thicker. This shape is consistent with the structural features of the retinal tissue and the distribution of the nerve fiber layer. The vertical and horizontal asymmetry in the figure is mainly It is caused by the nerve fiber layer. Clinical significance Abnormal results were macular holes, cystoid macular edema, diabetic retinopathy, age-related macular degeneration, and glaucoma. Need to check for patients with abnormalities in the retina of the population. Precautions Contraindications before examination: the refractive interstitial is cloudy. Requirements for inspection: first dilute the pupil. Inspection process Clearly, the posterior segment of the eye is mainly characterized by the morphological features of the macula and optic papilla, the interlaminar structure of the retina, the normal thickness of the retina and its nerve fiber layer, and the anterior segment of the cornea, iris, lens, etc., and accurate correlation measurements. data. Not suitable for the crowd Inappropriate crowd: other inflammatory patients with eyes.

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