What type of vision is defined as legally blind?

Legally blind is defined as having a visual acuity of 20/200 or worse in the better seeing eye with corrective lenses. This means that a person with this level of vision sees at 20 feet what a person with normal vision sees at 200 feet. Therefore, a visual acuity of 20/200 falls within the parameters set by the criteria for legal blindness.

In contrast, visual acuities of 20/40 and 20/150 indicate levels that do not meet the threshold for legal blindness, as 20/40 vision is still considered relatively normal and capable of functioning well in daily activities. A visual acuity of 20/150, while significantly impaired, is still better than 20/200. The progression from 20/150 to 20/200 marks a critical point where legal blindness is established. Thus, the correct answer is indeed related to the established legal definitions surrounding visual impairments.