Antonyms for the word "most clear-sighted" can be vague, ignorant, foolish, short-sighted, obtuse, obscure, or dim-witted. These words are the opposite of being perceptive, insightful, and sharp-witted. A person who is not clear-sighted may not be able to see things as they are, they may lack the necessary intelligence, and may have a limited understanding of the world around them. They could also not have a good sense of judgment or decision-making abilities, which may cause them to make mistakes. Hence, it is always better to be clear-sighted to ensure a more insightful perspective on things.