What is one advantage of using the Snellen chart in vision training?

Using the Snellen chart primarily aids in measuring visual acuity, which is the clarity or sharpness of vision. It consists of letters of varying sizes that individuals read from a specified distance. The results indicate how well a person can see and help identify any degree of vision impairment. This measurement is critical in determining the need for corrective lenses or other interventions in vision training. It is a standardized tool that provides a reliable assessment of an individual's visual capabilities, making it an essential part of vision evaluations and training programs.