What is a common sign that indicates the presence of keratomalacia?

Corneal melting, known as keratomalacia, is a critical condition that occurs when the cornea undergoes severe degeneration, often due to an inflammatory response or infection. In keratomalacia, the corneal tissue softens and thins, making it susceptible to further damage and potential perforation. This process is characterized by the progressive loss of corneal stroma, leading to the appearance of a cloudy or necrotic area on the cornea.

The observation of corneal melting is significant because it can indicate underlying issues such as severe ulcerative keratitis, infectious agents, or degenerative diseases affecting the cornea. Recognizing this sign is vital for timely intervention and treatment to prevent irreversible damage and preserve vision.

In contrast, rapid eyelid movement might suggest irritation or discomfort but does not specifically indicate keratomalacia. Changes in eye color are typically unrelated to this condition and may indicate other eye problems. Increased tear production can be a response to various ocular conditions but does not specifically point to corneal melting. Thus, corneal melting is distinct and a hallmark sign of keratomalacia, making it the most relevant answer to the question.