Dr. Christine Erlich

Optical Coherence Tomography (OCT)

OCT is a laser imaging technique developed to provide accurate and reproducible cross-sectional measurements of the retina. The OCT allows your doctor to see the internal structures within the eye. It utilizes high definition imaging to “see” below the surface, allowing your doctor to examine all the retinal layers which could not be imaged previously. In addition, software within the machine compares tests over time. This allows your doctor to accurately monitor improvement or progression of a disease process.

The OCT helps provide definitive diagnostic information for a comprehensive range of retinal pathology such as: detached retina, macular holes, age related macular degeneration (AMD), cystoid macular edema and diabetic retinopathy. In glaucoma the test can be used in patients with an established diagnosis to detect the progression over time, which indicates uncontrolled disease and possible need for therapy advancement. For patients suspected of having the disease, the test can be used to confirm the diagnosis.

The OCT is not a treatment laser and is not harmful to the eye. It operates similar to ultrasound, except light is used instead of acoustic waves. The instrument is non-invasive and takes just minutes to complete. The test is performed at your doctor’s office. Patients simply look at a target light for several seconds while the image is being taken. There is no pain and drops are usually not required.

OHIP covers the cost of an OCT. (OHIP limits the number of tests per year which are covered).