OCT and ERM

Since summer's almost over and the countdown to my last day of work has begun, I decided that it might help the days go by faster and more memorably if I start documenting the things I see and learn at work.



Today I got to see the elusive OCT (optical coherence tomography) machine, which provides high-resolution cross-sectional images of the retina using light waves that are reflected in varying amounts by the different retinal layers. (See sample above.) Two-dimensional data sets taken in two meridians can be further used to create a three-dimensional representation of the patient's retina around the macula. This test is not part of a normal oculo-visual assessment; it incurs a separate cost ($85 where I work). It takes about 15-20 minutes for a compliant patient, and is recommended for those with macular pathology - for example, patients with diabetic retinopathy, which was the case today.

Hard deposits around the macula were evident in the patient's fundus photos. With the OCT images, you could see the edematous elevations around the macula. Focal hemorrhages were noted, as well as an epiretinal membrane OS. Epiretinal membranes (ERMs) are commonly associated with retinal vascular disorders. Cells liberated through a retinal break proliferate on the retina, resulting in tractional forces that can cause visual distortion, macular holes, and cystoid macular edema. Approximately 90% of ERMs stabilize or regress, otherwise they can be peeled away surgically.

I also learned a bit about Barter Networks, which allow people to acquire services by trading their time and services using a point system.

And there is also supposedly a new drug that 'reverses glaucoma'!

Workdays left: 16