Boulder Eye Surgeons

Donald Keller MD, Brian Nichols MD PhD and Kevin Cuevas MD

Optical Coherence Tomography

Optical Coherence Tomography, or OCT, is a laser-based, noncontact, noninvasive imaging technique that is capable of obtaining high resolution images of the retina and its components.

optical coherence tomography

OCT is analogous to ultrasound imaging except that light rather than sound waves are used, resulting in a much higher resolution of approximately 10µm in the retina. OCT provides direct, real-time, cross-sectional images of retinal tissue layers, allowing improved resolution and diagnostic capabilities of a variety of eye diseases.

optical coherence tomography

NFL: Nerve Fiber Layer RPE: Retinal Pigment Epithelium
ILM: Inner Limiting Membrane CC: Choriocapillaris
GCL: Ganglion Cell Layer IPL: Inner Plexiform Layer
IS/IOS: Inner & Outer Photoreceptor Segment Junction OPL: Outer Plexiform Layer

OCT has the capability of measuring the retinal nerve fiber layer thickness in glaucoma, making it possible to detect glaucoma damage at an earlier stage than was previously possible. In addition, objective measurements can be monitored, aiding in better control of disease progression.

oct nerve fiber layer
Retinal nerve fiber layer analysis can be compared to normative data in addition to data from successive visits to reveal damage and progression from glaucoma.
oct macula
Macular thickness analysis can also reveal macular complications and provides the ability to track changes over time.
oct optic nerve
Optic nerve head analysis gives objective cross-sectional information on cupping and neuroretinal rim area.

Laser Trabeculoplasty