What was the visual acuity for Ms. Jones' left eye?

The correct answer reflects Ms. Jones' visual acuity of 20/20 for her left eye, which denotes normal vision. In ocular assessments, a visual acuity measurement of 20/20 means that the individual can see at a distance of 20 feet what a person with normal vision can see at that same distance. This standard indicates that there are no significant refractive errors or other vision impairments.

In this context, other visual acuity measurements such as 20/30, 20/40, or 20/50 denote varying degrees of diminished vision, indicating that the person sees less clearly than someone with standard vision. For instance, 20/30 means that at 20 feet, the person sees what a normal person can see at 30 feet, which would signify a mild degree of visual impairment. Therefore, the measurement of 20/20 indicates that Ms. Jones’ left eye is functioning optimally.