OCTA Scan in Ranchi
OCT Angiography (OCTA) — advanced, dye-free imaging of retinal blood vessels — performed and interpreted by Dr. Dibya Prabha, Retina Specialist, at Neurovision Clinic.
What is OCTA (OCT Angiography)?
OCTA (Optical Coherence Tomography Angiography) is the latest advancement in retinal imaging that captures detailed 3D maps of blood vessels in the retina and choroid — entirely without injecting any dye. It uses the movement of red blood cells through retinal vessels to create high-resolution images of blood flow. Compared to traditional fluorescein angiography which requires IV dye injection and takes 20+ minutes, OCTA is completely non-invasive, takes only seconds, and provides depth-resolved images showing exactly which retinal layer is affected.
At Neurovision Clinic, Dr. Dibya Prabha uses OCTA to detect and monitor retinal vascular diseases with unprecedented precision.
Why is OCTA (OCT Angiography) Done?
- •Detect abnormal blood vessel growth (choroidal neovascularization) in wet macular degeneration
- •Identify areas of retinal non-perfusion (poor blood flow) in diabetic retinopathy
- •Evaluate retinal vein and artery occlusions — map areas of ischemia
- •Monitor response to anti-VEGF therapy — visualize regression or persistence of abnormal vessels
- •Assess macular ischemia in diabetic patients
- •Detect early microvascular changes before structural damage occurs
- •Evaluate foveal avascular zone (FAZ) changes in various retinal diseases
How OCTA (OCT Angiography) is Performed
- 1
Positioning
You sit comfortably at the OCTA machine with your chin on the chin rest and forehead against the support bar.
- 2
Fixation
You focus on a target light while the machine performs rapid, repeated OCT scans. No dye, no injection, no contact with the eye.
- 3
Acquisition
The machine captures thousands of scans over a small area of your retina in just a few seconds. Motion correction software ensures clear images even if you blink or move slightly.
- 4
Review
Dr. Dibya Prabha reviews the 3D vascular maps, identifies areas of abnormal blood flow or vessel growth, and discusses findings and treatment decisions immediately.
How to Prepare
- •No special preparation is needed — no fasting, no dye, no IV
- •If dilation is required, bring sunglasses for after your appointment
- •Bring a list of current medications, especially blood thinners or diabetes medications
- •The test takes only 5–10 minutes for both eyes
Related Conditions
OCTA (OCT Angiography) helps diagnose and monitor these conditions. Explore our condition pages for more detailed information about each.
Frequently Asked Questions
What is OCTA and how is it different from OCT?
OCTA (OCT Angiography) is an advanced form of OCT that specifically visualizes blood flow in the retina and choroid — without any dye injection. While standard OCT shows retinal structure (layers), OCTA shows retinal blood vessels and can detect abnormal blood vessel growth, blocked vessels, and areas of poor circulation. It provides information similar to traditional fluorescein angiography but is faster, dye-free, and completely non-invasive.
Who needs an OCTA scan?
OCTA is particularly valuable for patients with diabetic retinopathy, age-related macular degeneration (to detect abnormal blood vessels), retinal vein occlusions, and other retinal vascular diseases. It helps Dr. Dibya Prabha detect disease earlier and monitor treatment response more precisely.
Is OCTA scan safe?
Yes, OCTA is very safe. Unlike traditional fluorescein angiography, OCTA does not require dye injection, so there is no risk of allergic reaction, no nausea, and no needle. It uses the same safe light-based technology as standard OCT.