Which of the following is a common symptom indicating a need for a vision assessment?

The correct choice indicates that all listed symptoms are common indicators of a potential vision problem that warrants a comprehensive vision assessment. Frequent headaches can often be linked to vision issues, particularly when strain is placed on the eyes during activities like reading or prolonged screen use. Difficulty focusing is another significant sign that suggests the eyes may not be working together effectively or that refractive errors could be present. Blurred vision is a direct indication that there may be issues with the clarity of vision, often associated with uncorrected refractive errors or other conditions affecting the eyes. Each of these symptoms—frequent headaches, difficulty focusing, and blurred vision—demonstrates a distinct aspect of visual health, thus reinforcing the importance of a thorough examination to determine the underlying causes and appropriate interventions.