Pseudoxanthoma elasticum (PXE) is a rare, inherited condition that slowly changes the body’s elastic tissues. “Elastic tissues” are stretchy parts that help ...

Pseudotumor cerebri means the pressure inside the skull is higher than normal even though there is no brain tumor. The word “pseudo” means “false,” so the name ...

Pseudostrabismus means the eyes only look misaligned, but they are actually straight. The word “pseudo” means “false.” The word “strabismus” means “true eye ...

Irvine–Gass Syndrome is swelling in the center of the retina (the macula) that happens after cataract surgery. The swelling forms many tiny fluid-filled spaces ...

Pseudophakic cystoid macular edema is swelling in the very center of the retina (the macula) that happens after cataract surgery. “Pseudophakic” means there is ...

Pseudophakic bullous keratopathy is a long name that describes a clear problem in very simple terms, and the plain meaning helps you understand it step by ...

Aphakia means the eye has no natural lens. The lens is normally a clear structure that focuses light. Aphakia can happen because the lens was removed by ...

“Pseudophakic” means the natural lens of the eye has been removed (usually because of cataract) and replaced with an artificial lens implant, called an ...

Pseudopapilledema means the optic nerve head (the “disc” you see at the back of the eye) looks swollen, but it is not truly swollen from raised pressure in the ...

Pseudomonas keratitis is a serious infection of the cornea—the clear, dome-shaped window at the front of the eye—caused by a bacterium called Pseudomonas ...

Pseudoexfoliative glaucoma is a type of glaucoma that happens because tiny, flaky fibers build up in the front part of the eye. These fibers are not dust or ...

Pseudoexfoliation syndrome is an age-related condition of the eye. In this condition, tiny white, flaky fibers build up on front parts of the eye. These parts ...

Foster Kennedy Syndrome is a special pattern of eye and brain findings that happens when a space-occupying problem inside the skull presses on one optic nerve ...

Pseudo-Foster Kennedy Syndrome is a pattern your eye doctor can see when looking at your optic nerves. One optic nerve looks pale and thin because it was ...

Prostaglandin-Associated Periorbitopathy (PAP) is a collection of look-and-feel changes around the eyes that can happen in some people who use prostaglandin ...

Prosopagnosia is a problem where a person cannot recognize faces in a normal way, even when the eyes can see clearly and the brain can think and speak ...

Your cornea is the clear, front window of the eye. It has a very rich network of tiny nerves that work like sensors. These nerves keep the surface healthy, ...

Proliferative vitreoretinopathy—usually shortened to PVR—is a scarring response that can happen after a retinal detachment. Cells in and around the retina ...

Progressive Supranuclear Palsy (PSP) is a brain disease that slowly worsens over time. “Progressive” means it gradually gets worse. “Supranuclear” means the ...

Progressive outer retinal necrosis is a fast and aggressive viral infection of the retina, which is the thin, light-sensing tissue that lines the back of the ...