Retina Glossary of Terms
Understanding the Retina and Its Key Components
The retina is a thin layer of nerve tissue that converts light into signals your brain can read. Knowing the parts of this tissue helps explain how vision works and why certain problems develop.
The vitreous is a clear, gel-like substance that fills the center of the eye and helps it keep its round shape. Changes in the vitreous with age can contribute to common retinal conditions.
Often compared to a cable, the optic nerve is a collection of more than a million nerve fibers that carries visual signals from the retina to the brain.
The choroid is a dense layer of blood vessels located between the retina and the white outer layer of the eye. It supplies oxygen and nutrients to the outer retina.
This light-sensitive tissue captures images and converts light into signals. It is one of the most active tissues in the body and relies on a rich blood supply.
Found at the center of the retina, the macula is responsible for sharp, central vision that you use for reading, driving, and seeing faces.
Located in the middle of the macula, the fovea contains the highest concentration of cone cells, providing the sharpest and most color-sensitive vision.
Common Retinal Conditions
Many eye problems involve the retina. Recognizing these terms can help you understand symptoms, tests, and treatment plans.
AMD is a progressive disease that damages the macula and affects central vision, mainly in older adults.
- Dry AMD: The more common type, marked by thinning macular tissue and small deposits called drusen, leading to gradual central vision loss.
- Wet AMD: A less common but faster-moving form caused by abnormal blood vessels under the retina that leak fluid or blood, leading to rapid vision loss.
Diabetic retinopathy is a complication of diabetes that harms retinal blood vessels, while diabetic macular edema is swelling in the macula caused by fluid buildup.
- Non-Proliferative Diabetic Retinopathy: Early stage in which damaged vessels leak small amounts of blood or fluid.
- Proliferative Diabetic Retinopathy: Advanced stage in which new, fragile blood vessels grow because the retina lacks oxygen.
A retinal tear is a break in the retina, often caused when the vitreous pulls on it. If fluid slips through the tear and lifts the retina away from the eye wall, a retinal detachment occurs, creating an emergency that can lead to permanent vision loss if untreated.
A macular hole is a full-thickness defect in the center of the macula that causes a central blind spot or distortion. A macular pucker, also called an epiretinal membrane, is scar tissue on the macula that can wrinkle the retina and blur vision.
RVO is often described as a stroke in the eye. A clot blocks a retinal vein, causing hemorrhages and swelling from backed-up blood and fluid.
Key Diagnostic Tests
Accurate tests let your eye doctor see fine details inside the eye and track changes over time.
An OCT scan provides high-resolution, cross-sectional images of the retina. It measures retinal thickness, detects fluid, and tracks disease progression.
FA uses an injected dye that glows under blue light while a camera records blood flow in retinal vessels. It helps diagnose wet AMD, diabetic retinopathy, and retinal vein occlusion.
This simple grid helps patients monitor central vision for distortion. Regular use can catch subtle macular changes early.
When bleeding or other issues block a clear view, high-frequency sound waves create pictures of the inside of the eye, allowing evaluation of the retina.
Expanding Your Retina Glossary
These additional terms often appear in discussions about retinal health, diagnosis, and treatment.
Small yellow deposits under the retina that often appear in early dry AMD and can signal a higher risk of advanced disease.
The growth of new, abnormal blood vessels under the retina, typically seen in wet AMD. These vessels are fragile and leak easily.
A common age-related event in which the vitreous gel separates from the retina. While usually harmless, it can sometimes cause a retinal tear.
A reduced oxygen supply to retinal tissue that can trigger the growth of abnormal blood vessels in diseases such as diabetic retinopathy.
Visual distortion in which straight lines look wavy or bent, often linked to macular disorders.
Tiny bulges in retinal capillaries that can leak fluid and are an early sign of diabetic retinopathy.
The growth of new blood vessels in response to a lack of oxygen. These vessels are fragile and can cause complications.
Abnormal pulling on the macula by the vitreous gel, which can lead to a macular hole.
Retinal Treatments, From Injections to Surgery
Understanding treatment terms helps you discuss options and set expectations for care.
Medications injected into the eye that block vascular endothelial growth factor, reducing leaky vessels and swelling in conditions such as wet AMD and diabetic macular edema.
A focused laser creates tiny burns to seal retinal tears or stop leakage from abnormal vessels, helping manage diabetic retinopathy and other problems.
A surgery that removes the vitreous gel to allow direct access to the retina, often used for retinal detachment, macular hole, or significant vitreous bleeding.
A silicone band is placed around the eye, gently pressing the wall inward to support repair of a retinal tear or detachment.
An in-office procedure in which a gas bubble is injected into the eye to press the detached retina back into place while laser or freezing seals the tear.
Intense cold is applied over a retinal tear, creating a scar that secures the retina to the eye wall.
Your Trusted Retina Specialist in Montgomery County and the Greater Washington Metro Area
We believe informed patients make the best partners in care. Use this glossary to help guide conversations with our team and to better understand your diagnosis, tests, and treatment options. Together we will work to protect your precious sight for years to come.
Dr. Adams is the best. Compassionate, with a great staff!
john rockett
El Dr. Fernández y su equipo son profesionales, atentos y siempre están pendientes de los pacientes. Tratan a cada paciente como a una persona digna de atención personal y dedicación completa.
SS
Recibimiento cálido. Pruebas de preparación cuidadosas. Examen profesional con el Dr. Fernandes, quien me explicó lo que estaba haciendo en cada paso del proceso.
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Siempre es un placer ver al Dr. Fernandes. El doctor y el personal son muy profesionales, amables y comprensivos.
Christina
This place is great the doctor really takes his time with patients. He explains treatments and procedures well, staff are friendly, and they even offer a breakfast bar for everyone.
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