What sign might suggest a child has problems seeing far away?

The indication that a child cannot see the chalkboard suggests a potential vision problem related to distance vision, commonly known as myopia, or nearsightedness. In a classroom setting, a child who struggles to see the chalkboard effectively may often squint, lean forward, or exhibit signs of frustration when attempting to read or engage with distant visual materials. This difficulty can significantly impact their ability to learn and participate in classroom activities.

Other signs such as reading books excessively, always using a tablet, or expressing strong opinions do not specifically relate to distance vision issues. Reading books or using a tablet may suggest preferences for close-up vision but do not inherently signal a problem with seeing at a distance. Similarly, expressing strong opinions does not indicate any problems regarding visual ability. Therefore, the clear and direct correlation to distance vision issues is represented by the inability to see the chalkboard.