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Because early detection is of utmost importance in limiting the vision loss caused by glaucoma, regular eye examinations are recommended. Certain characteristics on an eye exam are clues for glaucoma: high eye pressure, optic nerve changes, thin corneas (the front layer of the eye), and closed angles (access to the drainage system of the eye is not open). Gonioscopy is when a mirrored contact lens is used to look at the drainage system of the eye and distinguish between open and closed angle glaucomas. Doctors commonly use diagnostic testing to help in establishing the diagnosis of glaucoma. Not only has Dr. Rhodes completed specialized training in glaucoma, he also has the most-advanced equipment for early detection of this disease.

Optic Nerve Photography

Digital photos are taken of your optic nerves periodically and included in your medical record. The photos can be analyzed and compared to evaluate for changes in appearance that are characteristic of glaucoma.


      Normal Retina/Optic Nerve                     Glaucomatous Optic Nerve


Optical Coherence Tomography

This test, commonly referred to as OCT, measures the thickness of the nerve layer in the back part of the eye. This nerve layer is thinned when glaucoma damage occurs. Repeat testing can be performed to evaluate the thickness of this layer over time. Dr. Rhodes uses a state-of-the art OCT machine, which performs the scan in the shortest amount of time, and uses computer analysis to compare results to all previous exams. This technology can greatly increase the ability to detect and follow glaucoma.

Visual Field Testing

This test evaluates the entire visual field, both central and peripheral. Glaucoma results in typical changes in the visual field, such as peripheral loss of vision. This test has been shown to increase glaucoma detection early in the disease. Usually, this test is performed yearly in glaucoma patients. Dr. Rhodes uses the most advanced visual field testing available: the equipment actually has a computer program which can evaluate every new test scientifically for changes from previous examinations.


Normal Visual Field              Glaucomatous Visual Field Changes


Anterior Segment Optical Coherence Tomography

This technology is similar to the previously mentioned OCT, but is used to image the front part of the eye. The anterior segment OCT is commonly performed in angle closure glaucoma patients to evaluate and quantify the opening between the iris and the trabecular meshwork (drainage system).


Normal Open Angle OCT

Narrow Angle OCT