Final answer:
Keratomalacia is the condition caused by vitamin A deficiency, leading to multiple health issues including visual impairments and weakened immune system function.
Step-by-step explanation:
A condition caused by vitamin A deficiency is known as keratomalacia. This deficiency causes several health issues, which include the dryness of the eye and skin, and the keratinization of various tracts and glands in the body. Vitamin A is crucial for immune system development, preventing anemia, and avoiding visual impairments from night blindness to total blindness. It's important to consume adequate amounts of vitamin A to prevent these health issues, which can be particularly prevalent in developing countries.