Reported Daily Screen Exposure Above One Hour and Maternally Observed Eye-Related Symptoms Among Under-Five Children in Ibadan, Nigeria: A Cross-Sectional analysis

In the modern home, a glowing screen has become a constant companion for children, often serving as a digital babysitter, a source of entertainment, and a tool for early learning. For parents navigating the complexities of daily life, these devices offer a moment of respite, but they also raise a quiet question that has grown louder in recent years: how much screen time is too much for a young child? Health experts have long suggested that very young children should have little to no sedentary screen time, while those slightly older should be limited to about an hour a day. The concern is not just about what children are watching, but how staring at a bright rectangle for long periods might affect their developing eyes and overall well-being. While we know that excessive screen use can strain the eyes of adults and older students, the picture remains hazy for children under five, who cannot tell us if their eyes feel tired or blurry. In many parts of the world, especially in rapidly urbanizing African cities, there is a lack of clear data on how common this exposure is and what physical signs mothers might be noticing in their toddlers.

This gap in knowledge is what a team of researchers set out to fill in Ibadan, a major city in southwestern Nigeria. They focused on the mothers of children under five years old, asking them to report on their children's daily habits and any eye-related issues they had observed. The researchers were not looking for a clinical diagnosis from an eye doctor, but rather for the subtle signals a mother might see: a child rubbing their eyes, squinting, holding a phone very close to their face, or complaining of a headache after using a device. By gathering information from 420 mothers across different neighborhoods in Ibadan, the study aimed to understand how widespread screen use was, how often these symptoms appeared, and whether the amount of time spent in front of a screen seemed to be linked to the mothers' observations of eye discomfort.

The results revealed that screen use is already a routine part of life for many young children in this urban setting. The researchers found that nearly seven out of ten children were reported to spend more than one hour a day on a screen. This high level of exposure was not just a weekday occurrence; on weekends, the number of children exceeding this one-hour mark rose even higher. Alongside this frequent use, the mothers reported a significant number of eye-related symptoms. When the researchers looked for children who showed two or more signs of eye strain—such as watery or red eyes, excessive blinking, squinting, frequent headaches, or holding a device too close—they found that more than two-fifths of the children fit this description. In fact, a large portion of the children were observed to have a mild to high burden of these symptoms, suggesting that eye discomfort is a common experience for this group.

When the researchers examined the relationship between screen time and these symptoms, a clear pattern emerged in the initial analysis. Children who spent more than an hour a day on screens were much more likely to show signs of eye strain compared to those who spent less time. The data suggested that the longer the exposure, the higher the chance a mother would notice these troubling signs. However, the story became more nuanced when the researchers considered the role of the mother's own behavior and knowledge. They found that mothers who were more knowledgeable about the risks of screen time and who held a more cautious view of screen use were less likely to report symptoms in their children. Furthermore, mothers who actively set rules—such as limiting duration, avoiding screens during meals, or creating screen-free times—had children with far fewer reported symptoms.

The most revealing part of the study came when the researchers tried to separate the effect of the screen time itself from the effect of how mothers managed that time. They discovered that the strong link between long screen hours and eye symptoms was heavily influenced by the mothers' regulation practices. When they adjusted their analysis to account for how strictly mothers controlled screen use, the direct connection between the duration of exposure and the symptoms became much weaker and was no longer statistically significant. This suggests that it is not just the number of minutes a child spends on a screen that matters, but the context in which that time happens. A child watching a screen for an hour under strict parental supervision, with breaks and proper viewing distance, might not show the same signs of strain as a child with the same amount of exposure but no rules or oversight. The study also highlighted that viewing in a dark or dimly lit room was a strong factor associated with symptoms, pointing to the importance of lighting conditions alongside duration.

Despite these findings, the researchers were careful to note the limits of what their study could prove. Because the data was collected at a single point in time, they could not say for certain that the screen time caused the symptoms, only that the two were observed together. Additionally, the study relied entirely on what mothers reported, which means the results reflect their perceptions and observations rather than a clinical eye examination. The researchers also noted that their data did not allow them to distinguish between children under two years old and those between two and five, a distinction that is crucial because health guidelines differ for these age groups. Consequently, while the study confirms that screen exposure and eye symptoms are common in this urban Nigerian sample, it cannot definitively state that screen time alone is the sole cause of the discomfort.

The implications of this work point toward a need for more practical guidance for families. Rather than simply telling parents to stop screens, the findings suggest that helping mothers establish clear routines, monitor viewing conditions, and recognize early signs of eye strain could be more effective. The study underscores that in a world where digital devices are ubiquitous, the focus should shift from just counting minutes to understanding the quality of the experience. For the mothers in Ibadan, and potentially for families elsewhere, the message is that while screens are a part of modern life, how they are used matters deeply. The researchers conclude that future studies need to look more closely at the specific ages of children, the types of devices used, and the actual content being viewed, while also including professional eye exams to confirm what mothers are seeing. Until then, the evidence suggests that attentive parenting and sensible rules remain the best defense against the growing tide of digital eye strain in young children.