What Is Optical Coherence Tomography (OCT)?

Detect Glaucoma Early with Advanced OCT

What Is Optical Coherence Tomography (OCT)?

OCT is an advanced imaging technique used to detect glaucoma and many other eye conditions. It delivers highly detailed pictures of the inside of your eye, often revealing changes long before symptoms appear.

Optical Coherence Tomography uses light waves to create layer-by-layer images of the retina and optic nerve. These cross-sectional views allow our eye doctors to see subtle changes that may be invisible during a standard exam.

Because OCT captures microscopic detail, our specialists can catch problems sooner and tailor treatments that safeguard your vision over the long term.

How Does an OCT Scanner Work?

How Does an OCT Scanner Work?

An OCT scanner operates like an “optical ultrasound,” using light instead of sound to map the internal structures of your eye. The entire process is quick and comfortable.

The scanner projects light into the eye, and reflections from each layer are measured to build a detailed image. Bright areas represent dense tissue, while darker areas show softer structures.

During the scan you simply keep your eye still as the machine records images within seconds. There is no contact or discomfort, and the high-resolution results help guide personalized treatment plans.

Beyond Structural Imaging: Advanced OCT Features

Beyond Structural Imaging: Advanced OCT Features

Modern OCT systems provide deeper insights than basic structural images alone. One key advancement is OCT Angiography, which maps blood flow in the retina without dye injections.

OCTA generates three-dimensional maps of retinal blood vessels, revealing circulation problems linked to conditions like diabetic retinopathy or certain forms of macular degeneration. By identifying abnormalities early, our team can address issues before they threaten vision.

Diagnostic Benefits of OCT

OCT helps diagnose a wide range of eye conditions by offering clarity that routine exams may miss. The technology is invaluable for early detection and ongoing management.

OCT identifies yellowish deposits and white patches that signal diabetic retinopathy or reduced blood flow, allowing careful monitoring over time.

These tiny deposits under the retina serve as early warnings for macular degeneration. OCT tracks their size and distribution with precision.

This benign thickening of the pigment layer is easily recognized on OCT, helping rule out more serious problems.

Similar to a mole in the eye, a nevus can be assessed for depth and stability to ensure it does not progress to a concerning condition.

When the vitreous gel pulls on the retina, OCT illustrates the traction and assists in deciding whether treatment is needed.

OCT shows the depth and extent of a macular hole, key factors in determining if surgical repair is advisable.

A thin film of scar tissue can blur or distort vision. OCT reveals the shiny layer over the retina so its impact can be evaluated.

Fluid pockets or dome-like elevations beneath the retina appear clearly on OCT, signaling the need for early intervention.

Types of OCT Technology

Types of OCT Technology

OCT technology has evolved to offer faster scans and greater detail. Different systems are selected based on the depth and clarity required for each case.

The earliest form provides useful images but is slower and lower in resolution, so some fine details may be missed.

Now common in clinics, SD-OCT is faster and delivers sharper images, reducing motion artifacts and improving accuracy.

The most advanced option captures images rapidly and penetrates deeper layers, such as the choroid, which is valuable for complex cases.

What to Expect During an OCT Scan

What to Expect During an OCT Scan

An OCT scan is non-invasive, painless, and takes only moments. The streamlined process makes it an essential part of thorough eye care.

You will sit comfortably with your chin on a support, and in some cases your pupils may be dilated for a clearer view.

You will focus on a target while gentle light is projected into your eye.

The scanner moves across your eye, capturing detailed images in seconds without touching the surface.

Our specialists review the images immediately, explaining any findings so you understand your eye health.

Insights from OCT Imaging

Insights from OCT Imaging

OCT offers a window into the various layers of your eye, enabling early detection of many sight-threatening conditions.

Thinning of the retinal nerve fiber layer, an early sign of glaucoma, appears clearly on OCT images.

Areas of fluid buildup associated with macular edema are visible as dark spaces, guiding timely treatment.

OCT detects small deposits, swelling, or scar tissue formation seen in epiretinal membranes and other disorders.

The technology maps the retina, retinal pigment epithelium, and choroid, giving a comprehensive overview of ocular health.

Partner With Us to Protect Your Vision

Partner With Us to Protect Your Vision

For more than six decades, our Philadelphia practice has provided compassionate, expert eye care to the community. By combining advanced OCT technology with personalized attention, we help you maintain healthy eyes and clear vision for years to come.

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