Vision screening services shall be provided annually for all __________ children 3 years of age (or older).

The correct answer highlights the importance of providing annual vision screening services specifically for all preschool children who are 3 years of age or older. This group is particularly vulnerable to vision problems that can affect their development and learning. Early detection through regular vision screenings can lead to timely intervention, which is crucial in preventing or mitigating long-term vision issues that could impact their educational achievements and quality of life.

Preschool-age children are at a stage where they are developing critical visual skills necessary for learning and socialization. Since they often start school around this age, ensuring their vision is healthy is vital for their readiness and success in early education settings.

While other age groups, like kindergarten or elementary school children, also require vision screenings, the specific mention of preschool children addresses the state's commitment to early intervention and comprehensive vision health across developmental stages.