Squinter is a colloquial term used to describe someone who has difficulty seeing things clearly either because of poor eyesight or due to a habit of squinting. There are several synonyms for the word squinter, each with their unique connotations. One such synonym is "blinker," which means someone who blinks a lot while trying to focus, while another is "scrutinizer," which describes someone who scrutinizes things closely. Other synonyms include "nearsighted," "astigmatic," "farsighted," and "myopic." Each word has a slightly different meaning and can be used in different contexts to describe someone who has trouble seeing things.