Optical Coherence Tomography OCT
How OCT Imaging Works
This section explains the science behind OCT and why it is so useful for diagnosing eye conditions.
Unlike ultrasound, which uses sound waves, OCT uses invisible infrared light to measure how light reflects off the layers of the retina. The data are converted into detailed three dimensional images.
OCT shows each layer of the retina separately, allowing our specialists to measure thickness, find tiny changes, and spot early signs of disease.
The scan does not touch the eye, uses no radiation, and is comfortable for patients of all ages. This makes it ideal for regular monitoring.
What to Expect During an OCT Examination
Knowing what happens during an OCT visit can help you feel relaxed and prepared.
You will sit in front of the OCT machine with your chin on a support to keep your head still. In some cases dilating drops are given to widen the pupil for clearer images.
The camera captures multiple rapid images, usually in five to ten minutes. You might notice a red line moving across your view, but the process is painless and non contact.
If dilation was used, you may have temporary light sensitivity or blurred vision. Otherwise, there are no side effects from OCT itself.
Retinal Conditions Diagnosed With OCT
OCT helps our retina specialists detect and manage many sight threatening conditions, often before symptoms appear.
OCT reveals early and advanced signs of both dry and wet AMD.
- Buildup called drusen under the retina
- Fluid or bleeding inside or under the retina
- Thinning or damage in later stages
The scan measures swelling and structural changes caused by diabetes.
- Fluid in the macula
- Changes in retinal layer thickness
- Long term damage from leaking blood vessels
OCT shows the precise shape and severity of these problems.
- Full thickness holes in the central retina
- Wrinkling or pulling on the retinal surface
Doctors use OCT to confirm swelling and guide treatment.
- Fluid pockets in or under the retina
- Disrupted retinal layers
- Response to injections or laser therapy
The scan identifies fluid under the retina and allows careful follow up.
- Local areas where the retina lifts off
- Changes during healing or treatment
Smaller detachments near the macula are clearly seen on OCT.
- Early fluid buildup
- Extent of reattachment after surgery
OCT pinpoints where the gel inside the eye pulls on the retina.
- Sites of traction or stretching
- Risk of forming a macular hole
The scan detects swelling or new vessels linked to serious retinal diseases.
- Raised areas under the retina
- Growth of abnormal vessels
Using OCT for Ongoing Eye Health Management
Regular OCT scans help track changes and guide personalized care plans.
By comparing new scans with previous images, our team can see if a disease is progressing or improving and act before vision loss occurs.
Accurate measurements of retinal thickness and structure help tailor treatments and evaluate how well they are working for each patient.
Benefits of OCT
OCT offers several advantages that make it a cornerstone of eye care.
The scan is comfortable, uses light instead of radiation, and can be repeated as often as needed.
High resolution images reveal subtle changes long before symptoms start.
The entire scan takes only a few minutes and provides immediate diagnostic information.
OCT and OCT angiography together give a complete picture of both retinal layers and blood flow.
Detailed maps of retinal changes help our specialists choose the right therapy and monitor its success.
Frequently Asked Questions
The answers below address common concerns about OCT in everyday language.
The scan itself lasts only seconds to minutes and is usually performed during a routine eye visit.
No, OCT is painless and does not touch the eye.
Sometimes dilating drops are used for a clearer view, which may cause temporary light sensitivity.
Regular scans are recommended for people at risk for conditions such as glaucoma, diabetes, or AMD, so changes can be monitored over time.
Yes, OCT is very sensitive and can reveal subtle retinal changes before vision is affected.
Dense cataracts or significant bleeding can reduce image quality, and your doctor will discuss alternative methods if needed.
Partnering With Our Retina Specialists
Our team is dedicated to protecting your sight with advanced imaging and compassionate care. If you have concerns about your retinal health, we are ready to help you understand your options and support your long term vision.
Dr. Arnett has provided excellent medical attention for my retina eye surgery and has a very professional and positive bedside manner. I would highly recommend him.
R. T
Friendly and caring retina surgeon, I highly recommend Dr. Arnett.
Shirly
Not only did they take me on short notice, EVERYONE in the office was overwhelmingly kind. Treated my infection and made me feel better about the whole thing emotionally.
Amb
My experience was great the staff was amazing
Norbert Donnell
Doc Hosler is the best! Dr. Kahn also on the list. Lucky to have them locally.
Patti DeSena