Eye Diseases Detected with Retinal OCT

Posted on: September 17, 2025

Protecting vision often comes down to detecting eye diseases early, before symptoms become noticeable. One of the most valuable tools in modern eye care is Optical Coherence Tomography (OCT). This non-invasive imaging technology allows doctors to look beneath the surface of the eye and see the retina in incredible detail. For patients, understanding how OCT works and what it detects can make the importance of regular eye exams even clearer. 

What is OCT? 

Optical Coherence Tomography (OCT) is a cutting-edge imaging test that uses light waves to capture detailed, cross-sectional pictures of the retina—the light-sensitive tissue at the back of the eye. 

Think of OCT as an “ultrasound with light.” Instead of using sound waves, OCT bounces light off the retina to create high-resolution images that show its layers. These images are so precise that even microscopic changes can be identified. 

Key Features of OCT: 

• Quick and painless: The scan takes just a few minutes and does not require any contact with the eye. 
• High-resolution images: OCT provides a 3D view of the retina, allowing for detailed analysis of its structure. 
• Disease tracking: By comparing images taken over time, doctors can determine whether a condition is stable or progressing. 

This ability to visualize and measure the retina makes OCT one of the most important diagnostic and monitoring tools in ophthalmology. 

Eye Diseases Detected with Retinal OCT 

Age-Related Macular Degeneration (AMD) 

AMD damages the macula, the central part of the retina responsible for detailed vision needed for activities like reading or recognizing faces. 

How OCT helps: OCT detects early signs of AMD such as drusen (yellow deposits) and fluid accumulation under the retina. These changes may occur long before vision problems appear, making OCT critical for early intervention. 

Diabetic Retinopathy 

This condition develops when long-term high blood sugar damages the retina’s delicate blood vessels, causing them to leak fluid or bleed. It is one of the leading causes of vision loss in working-age adults. 

How OCT helps: OCT reveals swelling, fluid leakage, and thickening of the retina (macular edema). By capturing and comparing scans over time, doctors can track the effectiveness of treatments such as laser therapy or injections. 

Retinal Detachment 

A retinal detachment occurs when the retina peels away from its supporting tissue at the back of the eye. This is a serious medical emergency that can lead to permanent vision loss if untreated. 

How OCT helps: OCT can detect early warning signs such as small retinal tears or fluid collecting beneath the retina. Identifying these problems promptly allows for treatment before a complete detachment occurs. 

Why OCT Matters to Patients 

One of the most empowering aspects of OCT is its ability to help patients see and understand their eye health. The images produced are easy to visualize and often presented side by side across visits. Patients can watch how their retina changes over time, whether a condition is improving, stable, or worsening. 

For example: 

A healthy retina appears smooth and even. 

A diseased retina may show swelling, thinning, or pockets of fluid. 

This visual evidence not only educates patients but also encourages them to stay proactive about follow-up care and treatments. 

The Importance of Early Detection 

Retinal diseases such as AMD, diabetic retinopathy, and retinal detachment are leading causes of vision loss worldwide. What makes them especially dangerous is that many of these conditions cause no noticeable symptoms in the early stages. By the time vision changes occur, damage may already be irreversible. 

OCT provides an early warning system. With its ability to detect microscopic changes before symptoms appear, patients have a much greater chance of protecting their vision with timely treatment. 

Prioritize of Your Eye Health 

If you are experiencing symptoms such as distorted or blurred vision, blind spots, sudden flashes of light, or changes related to diabetes or aging, it may be a sign of retinal disease. 

Schedule your retina exam today or call (760) 340-2394 to book your consultation. Early detection through advanced tools like retinal OCT could make all the difference in preserving your sight for the future. 

What Retina Patients says about us: 

“It was our first time going to Dr. Chan. My husband was the patient and we both really liked him. Dr.Chan was very thourgh and took his time checking my husband out. He explained everything so we could understand and answered any questions we had. The staff was awesome they all were very nice and helpful. We will be going back the end of September. We would definitely recommend him.“