How do you split xerophthalmia?

Xerophthalmia is typically split into two main stages: the early stage, known as night blindness, where the eyes struggle to adapt to low light due to vitamin A deficiency, and the later stage, characterized by more severe symptoms such as dryness of the conjunctiva and cornea, leading to possible corneal ulceration and vision loss. Clinically, it can also be classified based on the severity of corneal involvement, with mild cases showing just dryness and severe cases resulting in corneal scarring. Early detection and treatment with vitamin A supplementation are crucial for prevention of progression.