The retinal nerve fiber layer (RNFL) is the thin, outermost layer on the inside of the eye where the long cables (axons) of the retinal ganglion cells run ...

Retinal metastasis means cancer cells from somewhere else in the body have traveled through the bloodstream and settled inside the retina, the light-sensing ...

Leukemic retinopathy is an eye problem that happens in people who have leukemia, which is a cancer of the blood and bone marrow. In leukemia, the number and ...

Leukemia is a cancer of the blood and bone marrow. It changes how white blood cells, red blood cells, and platelets are made and how they work. The retina is ...

The retinal hemifield slide phenomenon happens when the right and left eyes can no longer keep the two halves of vision “locked together” at the midline. In ...

Rhegmatogenous retinal detachment is a serious eye condition where a break in the retina lets watery gel from the middle of the eye (called the vitreous) slip ...

Retinal displacement means the thin nerve layer at the back of the eye (the retina) has shifted from its normal place, even a little, so the picture your eye ...

Retinal detachment means the retina—the thin, light-sensing layer that lines the back of the eye—has pulled away from the wall of the eye that normally ...

VHL disease is an inherited condition that makes a person more likely to develop certain tumors and cysts in different parts of the body. These growths can be ...

Retinal capillary hemangioblastoma is a benign (non-cancerous) but highly vascular (very blood-vessel-rich) growth that arises inside the retina, which is the ...

A retinal astrocytic hamartoma is a benign (non-cancer) lump made of glial cells called astrocytes that sit in the top layers of the retina, especially the ...

Retinal artery occlusion is a sudden blockage of the blood vessel that brings oxygen-rich blood to the retina. The retina is the thin, light-sensitive layer at ...

Retinal Angiomatous Proliferation (RAP) is a special pattern of “wet” age-related macular degeneration (AMD). In RAP, tiny new blood vessels start inside the ...

Reticular Subretinal Drusenoid Deposits are tiny, spot-like or net-like buildups of material that sit above the retinal pigment epithelium (RPE) in the ...

Reticular pseudodrusen (often shortened to RPD) are tiny, grain-like deposits that sit above the retinal pigment epithelium (RPE) in the outer retina, in the ...

Reticular drusen are tiny, yellow-white bumps that sit above the retinal pigment epithelium (RPE), in the shallow space just under the light-sensing cells. ...

A corneal foreign body means that something that does not belong in the eye gets stuck on, or inside, the clear front window of the eye called the cornea. The ...

Relentless placoid chorioretinitis is a rare eye inflammation that affects the layer under the retina (the choroid and the retinal pigment epithelium). Doctors ...

A relative afferent pupillary defect means the pupils do not react equally when a light is moved from one eye to the other. Doctors check this with the ...

Refractive error is a problem where the eye does not focus light exactly on the retina, so the picture you see is not perfectly sharp, and this makes vision ...