© Copyright 2026 American Medical Association. All rights reserved.
The CPT® Code 92135 refers to a specialized ophthalmic diagnostic imaging procedure known as scanning computerized ophthalmic diagnostic imaging of the posterior segment of the eye, performed unilaterally. This procedure utilizes advanced laser technology to capture detailed images of the internal structures of the eye, specifically focusing on the posterior segment, which includes critical areas such as the optic nerve head, macula, and retina. The imaging is conducted using two primary types of laser scanning devices: confocal laser scanning ophthalmoscopy and scanning laser polarimetry. Confocal laser scanning topography employs stereoscopic videographic digitized images to derive precise measurements of the posterior eye structures, while scanning laser polarimetry assesses changes in the linear polarization of light as it passes through the eye's tissues. During the procedure, the patient is instructed to fixate on a computer-generated internal target, allowing for the acquisition of multiple radial scans. These scans yield digitized images that are displayed on a monitor, enabling the physician to calculate various measurements, including optic nerve head dimensions, macular thickness, and retinal thickness. Following the imaging, the physician interprets the results and compiles a comprehensive written report, which is essential for diagnosing and managing ocular conditions.
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