Which of the following is a subcategory of anatomic entropion?

The correct choice is hereditary entropion, which is a subcategory of anatomic entropion. Anatomic entropion refers to the condition where the eyelids are turned inward, causing the eyelashes to rub against the cornea, leading to discomfort and potential damage to the eye. Hereditary entropion is typically seen in certain breeds of dogs and cats due to anatomical conformations that are genetically inherited. Animals with this condition often present with signs of ocular irritation from a young age, highlighting the genetic component of this subtype.

Hereditary entropion is distinct from other forms because it specifically relates to the inherited traits that predispose certain breeds to have anatomical structures that facilitate the inward rolling of the eyelids. This aspect of entropion can influence breeding decisions and management practices in veterinary ophthalmology. Understanding this condition contributes to better breeding practices and prognosis for affected animals.

The other options represent types of entropion that do not fit the criteria of being purely anatomical and hereditary in nature. Age-related entropion typically occurs due to loss of skin elasticity and other age-associated changes, while infectious and environmental forms might lead to secondary changes but are not classified as anatomical entropion. Therefore, hereditary entropion correctly