OCT – Optical Coherence Tomography
A fast, non-contact imaging exam that reveals the layers of the retina in micrometer resolution. Essential for accurate diagnosis and treatment monitoring.
What Is OCT?
Optical Coherence Tomography (OCT) uses light waves to generate high-resolution cross-sectional images of the retina and optic nerve. Similar to ultrasound—but using light instead of sound—it allows the ophthalmologist to inspect each microscopic layer of the macula without touching the eye.
How the Exam Is Performed
You simply rest your chin on the support and look at a fixation target for a few seconds. There is no pain, contrast injection, or radiation. Results are available immediately and can be compared side-by-side with previous scans.
Main Indications
- •Age-Related Macular Degeneration (AMD).
- •Diabetic macular edema and diabetic retinopathy.
- •Retinal vein occlusions.
- •Macular hole, epiretinal membrane, and vitreomacular traction.
- •Glaucoma optic nerve fiber layer assessment and choroidal nevi monitoring.
Guiding Intravitreal Injections & Pre-Cataract Planning
During anti-VEGF therapy, OCT guides the "treat and extend" protocol by showing whether retinal fluid has resolved, allowing injection intervals to be safely customized for each eye.
Before cataract surgery, OCT detects subtle macular changes that might not be visible through a cloudy lens, ensuring safe selection of trifocal or EDOF premium intraocular lenses.
This exam is central to Retina & Intravitreal Injections and Cataract Surgery & Premium Lenses.
Frequently Asked Questions
Does an OCT scan carry any risk?
No. It is a non-contact, non-invasive exam that uses light waves without radiation or injectable dye, and can be repeated as often as needed.
Should I have an OCT scan before cataract surgery?
It is highly recommended, especially when planning a premium intraocular lens, because macular health directly determines the visual outcome.