Browse plain-English disease and condition guides, including symptoms, causes, diagnosis, treatment options, prevention, and when to seek medical care.
Persistent Hyperplastic Primary Vitreous (PHPV)—now more often called Persistent Fetal Vasculature (PFV) is a congenital (present at birth) eye condition. In a developing baby, the eye has...
Read articleAblepharon-Macrostomia Syndrome (AMS) is an extremely rare, autosomal dominant genetic disorder characterized principally by absent or underdeveloped eyelids (“ablepharon”) and an unusually wide, fish-like mouth (“macrostomia”)...
Read articleAcanthamoeba keratitis is a rare but potentially sight-threatening corneal infection caused by the free-living amoeba Acanthamoeba, which is found ubiquitously in soil, fresh water, and even...
Read articleAccommodative esotropia is a common form of childhood strabismus in which one or both eyes turn inward (esodeviation) because of excessive focusing (accommodation) linked to farsightedness...
Read articleAchromatopsia is a rare eye condition that affects how a person sees color. People with achromatopsia typically have trouble seeing colors or can only see them...
Read articleAchromatopsia is a rare, inherited vision disorder that causes a complete or partial inability to see color. People with achromatopsia rely almost entirely on their rod...
Read articleAchromatopsia 2 (ACHM2) is a genetic eye condition that starts from birth. It mainly affects the cone cells in the retina, which are the light-sensing cells...
Read articleAcquired Developmental Prosopagnosia, often referred to as ADP, is a condition that affects a person’s ability to recognize faces. It’s a complex condition, and in this...
Read articleAcquired ectropion uveae (AEU) is a condition in which the pigmented posterior layer of the iris—normally hidden on the back surface—becomes adherent to and everts onto...
Read articleAcquired oculomotor nerve palsy is a non-congenital condition in which the third cranial nerve (oculomotor nerve) becomes damaged after birth, leading to dysfunction of most extraocular...
Read articleAcquired ophthalmoparesis is a condition characterized by weakness or paralysis of one or more extraocular muscles—those that control eye movements—due to processes that occur after birth....
Read articleAcquired Orbital Dysmorphia (AOD) is a medical condition that affects the structure and appearance of the eye socket and surrounding areas. In simpler terms, it means...
Read articleDeuteranomaly might sound like a complicated term, but it’s actually a common type of color vision deficiency. In simpler terms, it means having trouble seeing certain...
Read articleAnomalous trichromacy is a condition that affects how a person perceives colors. Unlike normal color vision, where three types of cone cells in the eyes work...
Read articleDichromacy, also known as color vision deficiency, is a condition where an individual has difficulty perceiving certain colors. This condition can vary in severity and is...
Read articleProtanopia is a type of color vision deficiency where individuals have difficulty distinguishing between certain colors, particularly red and green. This condition can affect daily activities...
Read articleAcquired tritanopia is a condition that affects color vision, specifically the ability to see blue and yellow colors. Unlike congenital tritanopia, which is present from birth,...
Read articleCongenital tritanopia is a type of color vision deficiency that affects how individuals perceive blue and yellow hues. People with this condition have trouble differentiating between...
Read articleTritanopia, commonly known as blue-yellow color blindness, is a type of color vision deficiency. People with this condition have difficulty distinguishing between blue and green shades,...
Read articleDeuteranopia is a type of color blindness that affects how someone sees green light. It’s essential to understand its causes, symptoms, diagnosis, and treatment options to...
Read articleDichromatism is a condition where a person has difficulty distinguishing between certain colors. This can affect how they perceive the world around them and may impact...
Read articleIncomplete Rod Monochromatism, also known as Incomplete Achromatopsia or Incomplete Achromatopsia Syndrome, is a rare genetic condition affecting vision. In this condition, individuals have difficulties distinguishing...
Read articleComplete Rod Monochromatism, also known as achromatopsia, is a rare genetic eye disorder that affects color vision and visual acuity. Individuals with this condition have difficulty...
Read articleCone monochromatism is a rare genetic eye condition where the cones, the cells in the retina responsible for color vision, don’t function correctly. People with cone...
Read articleRod monochromatism, also known as achromatopsia or complete color blindness, is a rare visual condition that affects the perception of color and visual acuity. Individuals with...
Read articleAchromatopsia is a rare eye condition that affects how a person sees color. People with achromatopsia typically have trouble seeing colors or can only see them...
Read articleMonochromatism, also known as achromatopsia or total color blindness, is a rare vision disorder where individuals perceive the world without color. It’s essential to grasp the...
Read articleFloaters are small specks or clouds moving in your field of vision. They may appear as dark spots, squiggly lines, or cobwebs, and seem to dart...
Read articleTemporary tunnel vision is a condition where a person experiences a temporary loss of peripheral vision, causing them to only see what’s directly in front of...
Read articleAuditory distortion refers to a condition where sounds are perceived incorrectly or altered in some way. It can be a distressing experience, affecting communication and daily...
Read articleTunnel vision refers to a visual impairment where a person’s field of vision narrows, as if they’re looking through a tunnel. It restricts peripheral vision, making...
Read articlePerceptual distortion refers to the way our senses interpret information inaccurately, leading to altered perceptions of reality. It can affect various aspects of our lives, from...
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