is a rare genetic condition affecting nerves, brain development, appearance, and learning.

is a brain-related condition causing difficulty recognizing what a person sees.

affects the brain's visual processing areas, causing trouble seeing normally.

is a rare form of epilepsy causing brief visual disturbances or seizures.

causes worsening vision and gradual shrinkage of one or both eyes.

is a condition affecting the nerves that carry visual information.

causes persistent flickering dots and other visual symptoms, often without eye disease.

is a rare brain condition that prevents understanding written words.

is a treatable condition causing anemia, nerve problems, and fatigue.

is a rare inherited anemia that affects red blood cell production.

is a rare inherited disorder affecting vitamin B12 processing and protein metabolism.

is an inherited disorder causing acid buildup, sometimes helped by vitamin B12.

is a rare inherited disorder causing harmful methylmalonic acid buildup.

is a rare inherited disorder affecting vitamin B12 processing and metabolism.

is a rare inherited disorder causing harmful buildup of methylmalonic acid.

is a rare inherited disorder that disrupts protein and fat breakdown.

is a rare inherited disorder causing dangerous buildup of methylmalonic acid.

is an inherited disorder causing soft, weak bones from vitamin D problems.

is a rare birth defect pattern caused by vitamin K antagonist exposure.

is serious bleeding in babies caused by too little vitamin K.

is a group of conditions that affect how the body uses vitamins.

is an autoimmune condition causing patchy skin color loss (depigmentation).

is an inherited eye disorder that damages the retina and vision.

is a group of disorders affecting vitreous and retina, impairing vision.