What visual acuity is considered best corrected vision for low vision?

Best corrected vision for low vision typically refers to a visual acuity that allows individuals to perform daily tasks with relative ease using optical or other aids. A visual acuity of 20/40 is commonly accepted in this context as it represents the threshold at which individuals can read standard print and engage in many functional activities.

This level of acuity indicates that the individual can see at a distance of 20 feet what a person with normal vision can see at 40 feet, showing that there is some degree of visual impairment, but it is less severe compared to lower levels of visual acuity. In many states, a visual acuity of 20/40 is often sufficient for driving and other activities, which further emphasizes its role as a standard for those with low vision.

Lower acuities, such as 20/60 or 20/80, denote even more significant visual impairment and would typically require more substantial adaptations or support in daily activities. While a visual acuity of 20/20 is considered ideal and reflects normal vision, the context of low vision specifically emphasizes the practical level at which individuals can function, making 20/40 the appropriate benchmark in this scenario.