Detecting Glaucoma in its early stages

OCT (Ocular Coherence Tomography)

The more we learn about glaucoma, the more complex the problem becomes. We now know that pressure is only one factor in glaucoma. Above average pressure may not lead to damage in some eyes, and below average pressure may lead to blindness in rare cases. We have even found that the standard eye pressure tests may dramatically over or under estimate the true eye pressure.   We know now that up to 50% of the optic nerve can be damaged before visual field (peripheral vision) tests become abnormal. Recent studies indicating that treatment at the earliest stage of glaucoma results in better long term vision preservation have led to a search for ways to diagnose the problem before the peripheral vision changes occur. Potentially the most accurate way to do this is with Optical Coherance Tomography (OCT). Like a Computed Axial Tomogram (cat scan) OCT provides a cross section view of the optic nerve, using light rays instead of X-rays. With this latest technology, we can find damage earlier, and treat more effectively. For scanning problems in the Retina, OCT is the best technology. In summary, the best protection from glaucoma related vision loss is a periodic examination, and further tests if glaucoma is suspected. Let us know if you have any questions about glaucoma or the latest technology we have available.

Optical Coherence Tomographer Cirrus (OCT)

The OCT machine, or Optical Coherence Tomographer, is an advanced scanning device that performs cross sectional imaging of the back of the eye, it's like a cat scan without the X-Rays. With this machine the doctor is able to diagnose and monitor retinal, macular, and optic nerve disorders.

OCT is a non-invasive scan of the live tissues in the back of the eye, allowing the doctor to diagnosis damage to the retina, macula, and optic nerve at a much earlier stage than ever before. If after examining your eyes the doctor suspects abnormalities in the back of the eye, he may request an OCT scan to be done. The scan is a series of cross section pictures, like an ultrasound, that are analyzed to produce an image. In most cases of glaucoma and macular degeneration, the test is performed from one to four times per year. This allows the doctor to graph any subtle changes by comparing each scan to the last. In cases of unexplainable visual disturbances or changes, the OCT can detect swelling in the macula, which causes blurry or decreased vision.

This test is essential in monitoring retinal and macular healing patterns, allowing the doctor to determine treatment and follow ups. Each eye is tested individually, and an average of 8-10 pictures are taken per eye. As a patient, your only job is to look in a designated direction as instructed by the technician.

The information provided in this article and elsewhere on this website are for informational purposes only, and should NOT be considered a medical diagnosis or advice. When in doubt, please visit your local optometrist for a complete professional evaluation.