The phrase "half-blind" is used to describe someone who has partial vision loss. There are several synonyms for this term, including "partially sighted," "dim sighted," "vision-impaired," and "partially blind." These terms describe individuals who have some degree of vision loss but not complete blindness. Other related phrases include "low vision," which refers to individuals who have difficulty seeing even with corrective lenses, and "legally blind," which is a legal term used to describe individuals who have very low visual acuity, usually measured at 20/200 or worse. All of these terms are important in understanding and accommodating individuals with vision impairment.