The development of cilia on the eyelids, more commonly known as eyelashes, is a normal part of fetal development. These small hairs serve a protective function for the eyes. The timing of their appearance is largely predetermined by genetics and the overall course of gestation.
Eyelashes contribute to ocular health by shielding the eyes from debris and excessive light. Their presence is crucial for maintaining clear vision and preventing irritation. Historically, the appearance of well-formed features, including these hairs, has been viewed as a sign of healthy fetal development.