Which statement is true regarding the length of a vision training program?

The statement indicating that programs can vary based on individual needs is true because vision training is often personalized to accommodate specific visual challenges and the unique requirements of each learner. This flexibility allows practitioners to tailor the duration, intensity, and focus of the training to best support the individual's goals and progress.

Depending on factors such as the particular visual skills being targeted, the severity of visual deficits, and the individual's response to training, the length of a vision training program can change significantly. Some might require more time and repeated exercises, while others might progress more rapidly, necessitating a customized approach to ensure the effectiveness of the training.

The other statements suggest a rigidity in the duration or structure of vision training programs, which does not reflect the reality of individualized care and the adaptive nature of therapeutic interventions.