OCT Scan in Ranchi
Optical Coherence Tomography (OCT) — high-resolution, non-invasive retinal imaging — performed and interpreted by Dr. Dibya Prabha, Retina Specialist, at Neurovision Clinic.
What is OCT (Optical Coherence Tomography)?
Optical Coherence Tomography (OCT) is a advanced, non-invasive imaging test that uses light waves to create high-resolution, cross-sectional images of the retina — the light-sensitive tissue lining the back of the eye. Think of it as an 'optical ultrasound' that can visualize the retina's distinct layers with incredible detail, down to a few microns (thousandths of a millimeter). OCT can detect subtle retinal changes long before they cause visible symptoms, making it invaluable for early diagnosis and monitoring of conditions like diabetic retinopathy, macular degeneration, glaucoma, and macular holes. At Neurovision Clinic, Dr. Dibya Prabha uses OCT as a cornerstone of retinal evaluation — the test takes only a few minutes and provides immediate, detailed information about your retinal health.
Why is OCT (Optical Coherence Tomography) Done?
- •Diagnose and monitor wet and dry age-related macular degeneration (ARMD)
- •Detect diabetic macular edema — fluid accumulation in the retina from diabetic retinopathy
- •Evaluate the optic nerve and retinal nerve fiber layer for glaucoma diagnosis and monitoring
- •Diagnose macular holes, epiretinal membranes (macular pucker), and vitreomacular traction
- •Assess retinal vein or artery occlusions
- •Monitor response to treatment — anti-VEGF injections, laser, or surgery
- •Screen for hydroxychloroquine (Plaquenil) retinal toxicity in patients on long-term therapy
How OCT (Optical Coherence Tomography) is Performed
Positioning
You sit comfortably in front of the OCT machine. Your chin rests on a support and your forehead against a bar — similar to a slit-lamp exam.
Dilation (sometimes)
For some scans, your pupils may be dilated with eye drops for a wider view of the retina. Many modern OCT machines can scan through undilated pupils as well.
Scanning
You focus on a target light (a dot or crosshair) while the OCT machine scans your retina. The scan takes only seconds per eye. You may see a faint red line moving across your vision — this is the scanning beam.
Analysis & Review
Dr. Dibya Prabha immediately reviews the high-resolution cross-sectional and 3D images, explains the findings, and determines if any treatment or monitoring is needed.
How to Prepare
- •No special preparation is needed for most OCT scans
- •If dilation is required, bring sunglasses for after the appointment (you'll be sensitive to light for a few hours)
- •If dilation is used, arrange transportation — your vision will be blurry for 2–4 hours
- •Bring your current glasses or contact lens prescription if available
- •Inform the doctor of any medications you are taking, especially hydroxychloroquine
Related Conditions
OCT (Optical Coherence Tomography) helps diagnose and monitor these conditions. Explore our condition pages for more detailed information about each.