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Eye Examination and OCT

Patients and healthy research volunteers complete an eye examination to check vision level and range of side vision. Optical Coherence Tomography (OCT) is also performed to take a detailed picture of nerves and fibers of the eye. The examination is completed by an Ophthalmologist and it takes 45 minutes to complete. 

Eye test chart

How are the tests performed?

The visual field test measures side vision and is a straightforward, painless test. Sitting at a machine with a chin rest, the patient or healthy research volunteer is asked to press a button every time a light is flashed. It is important to keep the head still. The lights are bright or dim at different stages of the test.

Optical Coherence Tomography (OCT) is a painless and non-invasive imaging technique that takes a detailed picture of the retina, located at the back of the eye. The test includes sitting at a special machine with a chin rest. A special camera takes a picture of the retina and the image is transmitted to a computer for an Ophthalmologist to evaluate.  The scan takes five minutes or less to complete.

If it has been over a year since the patient or healthy research volunteer has been checked for glasses, we will offer to dilate his/her eyes to obtain an accurate current prescription, which will be provided at the end of the assessment. The dilating drops make the pupils large and blur the vision for three to four hours before returning the pupils and vision completely back to normal. If the patient or healthy research volunteer has an up to date prescription/recent optometrist assessment, this stage will not be required.

Patients and healthy research volunteers are asked to complete the Ophthalmic Assessment and OCT twice, 18 months apart.