Is a vision of 4.9 normal for a first-grade child?
Generally, a visual acuity of 4.9 in first-grade children is considered slightly below normal and may reflect an immature stage of development or mild refractive errors. If there are concerns, it is advisable to seek medical consultation early. Detailed analysis is as follows:

If a child has a visual acuity of 4.9 but shows no abnormal behaviors such as squinting, tilting the head to see objects, or frequently rubbing the eyes, this may simply be a temporary phase due to incomplete visual development. First-graders are typically 6–7 years old, and some children's vision naturally improves to 1.0 with age. In such cases, maintaining healthy eye-use habits in daily life is sufficient, and excessive concern is unnecessary.
However, if a child with visual acuity of 4.9 also experiences blurred vision, difficulty concentrating, or is found during an eye examination to have mild hyperopia (farsightedness), astigmatism, or other refractive errors, delayed visual development should be suspected. Without timely intervention, such conditions may affect future visual development. It is important to adjust eye-use habits under medical guidance and, when necessary, undergo targeted vision training to prevent worsening of the condition.
Parents should take their children for a vision screening every six months to track changes in visual acuity; limit screen time from electronic devices in daily life; ensure at least two hours of outdoor activity per day; and promptly visit a professional ophthalmology institution for evaluation if any abnormal eye-use behaviors are observed.