A retinal embolus is a small piece of material that travels in the bloodstream and becomes lodged in a retinal blood vessel. It is most often discussed in eye exams when clinicians look at the retina during a dilated fundus evaluation. A retinal embolus can be an incidental finding or appear in the setting of sudden vision symptoms. The term is commonly used in ophthalmology, optometry, and vascular medicine because it may reflect disease outside the eye.

hypertensive retinopathy is damage to the retina and its blood vessels related to high blood pressure. It is identified by eye clinicians during a retinal examination, often with dilating eye drops. It can reflect how long and how severely blood pressure has affected small blood vessels in the body. It is commonly discussed in ophthalmology, optometry, and general medical care as a sign of “target-organ” effects of hypertension.

branch retinal artery occlusion is a blockage of a smaller artery that supplies the retina. The retina is the light-sensing tissue lining the back of the eye. This condition can cause sudden vision changes in part of the visual field. It is commonly discussed in emergency eye care, retina clinics, and stroke-risk evaluations.

BRAO stands for branch retinal artery occlusion. It is a blockage of a smaller artery that supplies blood to the retina. It typically causes sudden, painless changes in vision in part of one eye. BRAO is most commonly discussed in ophthalmology, optometry, emergency care, and stroke-risk evaluation.

central retinal artery occlusion is a sudden blockage of the main artery that supplies blood to the inner retina. It is a vision-threatening eye emergency that can cause abrupt, painless vision loss. Clinicians use the term to describe a specific pattern of retinal ischemia (lack of oxygenated blood flow). It is commonly discussed in ophthalmology, optometry, emergency medicine, neurology, and stroke care.

CRAO stands for **central retinal artery occlusion**. It is a condition where blood flow through the central retinal artery becomes blocked. This can cause sudden, significant vision loss because the retina is highly sensitive to reduced oxygen. CRAO is a term commonly used in **eye clinics, emergency settings, and hospital stroke-style evaluations** when urgent vision loss is being assessed.

retinal artery occlusion is a blockage of blood flow in an artery that supplies the retina. The retina is the light-sensing tissue lining the back of the eye that enables vision. This condition is commonly discussed in emergency eye care because it can cause sudden vision loss. Clinicians use the term to describe a specific pattern of retinal ischemia (lack of oxygen from reduced blood flow).

branch retinal vein occlusion is a retinal blood-flow condition where a small vein draining the retina becomes blocked. It can cause sudden or gradual blurred vision in part of one eye. It is most often discussed in eye clinics when evaluating retinal hemorrhage, swelling, or vision distortion. It is commonly diagnosed and monitored by ophthalmologists and optometrists using retinal imaging.

BRVO stands for **branch retinal vein occlusion**. It is a condition where a **small vein in the retina becomes blocked**, affecting retinal blood flow. BRVO is commonly discussed in **eye clinics, retinal specialty care, and imaging reports**. It matters because it can cause **blurred or distorted vision**, especially when the macula is involved.

central retinal vein occlusion is a blockage of the main vein that drains blood from the retina. It can cause sudden or gradual vision changes, often in one eye. It is commonly discussed in retina clinics and emergency eye evaluations because it can affect central vision. It is a diagnosis that guides testing, monitoring, and treatment planning for retinal swelling and complications.

CRVO stands for **central retinal vein occlusion**. It is a condition where the main vein draining blood from the retina becomes blocked. CRVO is commonly discussed in retina clinics and emergency eye assessments for sudden vision changes. It is a **diagnosis**, not a procedure or a medication.

retinal vein occlusion is a blockage of a vein that drains blood away from the retina. The retina is the light-sensing tissue lining the back of the eye. This condition can lead to retinal swelling and bleeding that may affect vision. The term is commonly used in eye clinics to describe a cause of sudden or subacute vision changes.

tractional membranes are abnormal sheets of tissue that form on or near the retina and can pull on it. They are most often discussed in vitreoretinal disease, where “traction” means mechanical pulling that can distort retinal shape. Clinicians commonly identify tractional membranes during a dilated eye exam and retinal imaging such as OCT. They matter because traction can affect vision, retinal health, and surgical planning.

vitreous hemorrhage (diabetes) means bleeding into the vitreous, the clear gel that fills the center of the eye. It most often relates to advanced diabetic retinopathy, where fragile new retinal blood vessels can leak or rupture. People commonly describe sudden new floaters, haze, or a “curtain” of blurred vision. The term is used in eye clinics, emergency evaluations, and retina care to describe a cause of acute vision loss in diabetes.

neovascularization elsewhere (NVE) means abnormal new blood vessels growing on the retina away from the optic disc. It is a clinical term used in retinal exams and imaging reports. It most commonly comes up when grading ischemic retinal diseases such as diabetic retinopathy. It matters because these new vessels are fragile and can bleed or scar.

neovascularization of disc (NVD) means abnormal new blood vessels growing on or very near the optic disc (the “nerve head”) inside the eye. It is most commonly discussed as a clinical sign of retinal ischemia, meaning the retina is not getting enough oxygen. Clinicians use the term when examining the back of the eye (fundus) in conditions such as proliferative diabetic retinopathy and some retinal vein occlusions. It is a finding—not a standalone disease—and it helps guide further evaluation and management discussions.

retinal ischemia means reduced blood flow and oxygen delivery to the retina. The retina is the light-sensing tissue lining the back of the eye that supports vision. This term is commonly used in eye exams, imaging reports, and discussions of retinal vascular disease.

diabetic macular edema (DME) is swelling in the macula, the central part of the retina responsible for sharp, detailed vision. It happens when diabetes-related damage causes fluid to leak from retinal blood vessels into macular tissue. It is a common cause of vision changes in people with diabetic retinopathy. The term is used in eye clinics to describe a specific, treatable pattern of retinal thickening and fluid.

proliferative diabetic retinopathy is an advanced stage of diabetic eye disease that affects the retina. It happens when abnormal new blood vessels grow on the retina or optic nerve due to diabetes-related poor blood flow. It is commonly used as a clinical diagnosis in eye exams, retina clinics, and diabetes-related vision screening.

PDR stands for **proliferative diabetic retinopathy**. It is an advanced stage of diabetic eye disease where **abnormal new blood vessels** grow in the retina. PDR is commonly identified during a **dilated eye exam** in ophthalmology and optometry clinics. It matters because these fragile vessels can bleed or scar, which can threaten vision.