For kindergarten children, what is primarily tested and why?

In kindergarten children, visual acuity is primarily tested to ensure that they can see clearly at a distance, which is crucial for their learning and development in an educational setting. At this age, children's eye muscles are still developing, and their visual system may not be fully mature. Therefore, assessing visual acuity helps identify any potential problems with their ability to focus on objects, such as letters and numbers on a board, which are vital for their early learning experiences. Detecting issues at this stage can lead to timely intervention, allowing children to receive necessary support for optimal visual development and learning.