Which statement about collie eye anomaly is true?

Which statement about collie eye anomaly is true?

• A. It affects only collies
• B. It is hereditary in collies and other herding breeds
• C. It is exclusively a retinal detachment
• D. It is caused by infectious disease during pregnancy

Answer: (B)

Collie eye anomaly is a congenital, inherited eye disorder seen in collies and several other herding breeds. The condition stems from genetic defects in eye development, often passed down within a breed and across related herding breeds, rather than arising from infection or a single breed confinement. It can affect structures like the retina and choroid, with a range from developmental defects such as choroidal hypoplasia to more serious problems like retinal detachment in some cases. Because it is genetic and present in multiple herding breeds, the true statement is that it is hereditary in collies and other herding breeds.

Collie eye anomaly is a congenital, inherited eye disorder seen in collies and several other herding breeds. The condition stems from genetic defects in eye development, often passed down within a breed and across related herding breeds, rather than arising from infection or a single breed confinement. It can affect structures like the retina and choroid, with a range from developmental defects such as choroidal hypoplasia to more serious problems like retinal detachment in some cases. Because it is genetic and present in multiple herding breeds, the true statement is that it is hereditary in collies and other herding breeds.