Optic chiasm aplasia · Aplasia of the optic chiasm · Congenital absence of the optic chiasm · Chiasma opticum-Aplasie · Agenesie des Chiasma opticum · Optic chiasm, absence of · Achiasma · Achiasmie · Congenital achiasma
This is a rare congenital brain malformation where the optic chiasm—the structure where nerve fibers from each eye cross over to the opposite side of the brain—fails to develop. Without this connection, the visual pathways from the eyes to the brain's visual cortex are disrupted. This condition is notably documented in Belgian Sheepdogs as a form of congenital achiasma.
Symptoms are present from birth and typically become noticeable to owners as soon as the puppy's eyes open. Affected puppies show signs of visual impairment or complete blindness, often accompanied by involuntary, rapid eye movements and misaligned eyes.
This congenital condition is incurable, and there is no surgical or medical treatment available to restore normal vision. Management focuses on supporting the dog in a safe, stable environment, with initial diagnostic costs typically ranging from 500 to 2000 EUR.
Estimated range of typical treatment cost. Actual cost depends on severity, clinic and region.
More conditions affecting the Head / nervous system.