epithelial basement membrane dystrophy is a common corneal surface condition that affects how the outermost corneal cells attach and heal. It is sometimes called “map-dot-fingerprint dystrophy” because of its typical patterns on exam. It can cause fluctuating vision, irritation, or episodes of recurrent corneal erosion (sudden pain from surface breakdown). It is most commonly discussed in eye clinics during corneal evaluations, dry eye workups, and pre-surgical screening.

macular dystrophy is a group of mostly inherited (genetic) eye conditions that affect the macula. The macula is the central part of the retina responsible for sharp, detailed vision. These conditions are commonly discussed in retina clinics and in genetic eye disease care. The term is also used in education and research to describe macula-centered retinal degeneration.

granular dystrophy is an inherited condition that affects the clear front window of the eye called the cornea. It causes small, crumb-like (“granular”) deposits to build up within the corneal tissue over time. The term is commonly used in eye clinics to describe a specific pattern of corneal clouding seen on examination. It matters because these deposits can scatter light and gradually affect vision and comfort.

lattice dystrophy is a corneal dystrophy, meaning an inherited (or sometimes acquired) condition that affects the clear front window of the eye (the cornea). It is named for “lattice-like” branching lines that can be seen in the cornea on an eye exam. It is most commonly discussed in cornea clinics, comprehensive eye care, and ophthalmology training as a cause of corneal clouding and recurrent corneal erosions. It can affect vision and comfort over time, with severity varying by person and subtype.

Fuchs endothelial dystrophy is a progressive corneal disease that affects the innermost layer of the cornea. It reduces the cornea’s ability to stay clear by impairing fluid control inside the corneal tissue. People often notice blurry or hazy vision that can be worse on waking and improve later in the day. The term is commonly used in eye exams, cataract surgery planning, and corneal specialty care.

corneal dystrophy is a group of usually inherited conditions that affect the cornea, the clear front window of the eye. It involves abnormal changes in one or more corneal layers that can reduce clarity or alter the corneal surface. The term is commonly used in eye clinics to describe specific, patterned corneal diseases that are not caused by infection or injury. Some forms mainly cause fluctuating vision, while others cause recurrent pain or progressive corneal swelling.

A corneal foreign body is material that becomes stuck on or in the cornea, the clear front “window” of the eye. It often happens during activities like grinding, drilling, sanding, yard work, or contact lens wear. Clinicians commonly evaluate it in emergency departments, urgent care, and eye clinics. It is discussed as both a diagnosis (what happened) and a clinical problem that may require removal and monitoring.

recurrent corneal erosion is a condition where the cornea’s surface layer repeatedly breaks down. It often causes sudden eye pain, tearing, and light sensitivity, commonly on waking. In plain terms, it is like a “re-opening” of a prior scratch on the eye’s clear window. It is commonly discussed in eye clinics when evaluating repeated corneal abrasions or morning pain.

A corneal abrasion is a scratch or scrape on the cornea, the clear front surface of the eye. It involves damage to the corneal epithelium, the thin outer “skin” layer of the cornea. The term is commonly used in urgent eye care, emergency settings, and routine eye clinics. It describes a frequent cause of sudden eye pain, tearing, and light sensitivity.

A corneal ulcer is an open sore on the cornea, the clear front “window” of the eye. It usually reflects inflammation plus loss of surface tissue, often from infection or surface damage. The term is commonly used in ophthalmology and optometry to describe a potentially vision-threatening corneal problem. It is discussed in clinics, emergency eye care, and contact lens–related eye evaluations.

superior limbic keratoconjunctivitis is an inflammatory condition that affects the top (superior) part of the eye’s surface. It involves the conjunctiva (the thin membrane over the white of the eye) and the cornea (the clear front window of the eye). It commonly shows up as irritation and redness concentrated under the upper eyelid. The term is mainly used in eye clinics and in ophthalmology/optometry training to describe a specific pattern of ocular surface disease.

punctate epithelial erosions are tiny, dot-like areas of damage on the outermost layer of the cornea (the epithelium). They are usually seen during an eye exam using special dyes and a slit-lamp microscope. The term is commonly used in ophthalmology and optometry to describe a pattern of “surface breakdown” on the eye. They are a clinical finding, not a diagnosis by themselves.

filamentary keratitis is a condition where sticky strands (“filaments”) form on the surface of the cornea. These filaments can cause irritation because they tug on the corneal surface with blinking. It is most commonly discussed in dry eye and other ocular surface disorders. Clinicians use the term to describe a specific pattern seen on eye exam that helps guide evaluation and care.

Exposure keratopathy is corneal surface damage caused by the eye being too exposed to air. It happens when the eyelids do not close fully or the tear film does not protect the cornea well enough. It is commonly discussed in dry eye clinics, neuro-ophthalmology, eyelid (oculoplastics) care, and hospital/ICU eye protection.

neurotrophic keratopathy is a corneal disease caused by reduced or absent corneal nerve function. It can lead to poor corneal healing, surface breakdown, and ulceration. It is commonly discussed in eye clinics because it can look mild early on but become vision-threatening. It is diagnosed and managed by ophthalmologists and optometrists, often within cornea and ocular surface care.

VZV keratitis is corneal inflammation caused by varicella zoster virus (VZV). It is most often discussed in the setting of shingles affecting the eye area (herpes zoster ophthalmicus). It can involve the corneal surface, deeper corneal layers, or both. The term is commonly used in eye clinics to describe a specific cause of keratitis and guide evaluation and monitoring.

HSV keratitis is inflammation and infection of the cornea caused by herpes simplex virus (HSV). It is a common clinical diagnosis in eye clinics and emergency eye care settings. It can affect the clear front surface of the eye and sometimes deeper corneal layers. It matters because corneal clarity is essential for sharp vision.

herpetic keratitis is an infection or inflammation of the cornea caused most often by herpes simplex virus (HSV). The cornea is the clear, dome-shaped front surface of the eye that helps focus vision. This condition is commonly discussed in eye clinics because it can affect vision and can recur over time. The term is used in ophthalmology and optometry to describe a specific pattern of corneal disease linked to herpes viruses.

acanthamoeba keratitis is an infection of the cornea (the clear front “window” of the eye) caused by Acanthamoeba organisms. It is discussed in eye care because it can be vision-threatening and can be difficult to diagnose early. It is most commonly described in the context of contact lens wear, but it can also occur without contact lenses. In clinics and hospitals, the term is used to guide specific diagnostic tests and targeted anti-infective treatment.

fungal keratitis is an infection of the cornea caused by fungi. It can lead to a corneal ulcer, inflammation, and reduced vision. It is commonly discussed in eye emergency care, cornea clinics, and contact lens–related eye disease. It is also a core topic in ophthalmology and optometry training because early recognition can affect outcomes.