Why setting limits on screen time matters

23/07/2026

An ophthalmology and social care perspective to understand how excessive screen use affects children’s sleep, eyesight, attention and well-being.

When screen use becomes a habit

In everyday life, screens have gone from being a tool to occupying a central place in childhood. And this is the key point: the issue is not only educational, but also health-related. When digital use displaces active play, rest, conversation and exposure to natural light, children’s bodies and brains feel the effects. This reflection is in line with the Barraquer Foundation’s Childhood and Screens Guide.

From an ophthalmological perspective, excessive screen time is associated with greater demand on near vision and fewer breaks, factors that may contribute to eye strain and poor visual hygiene habits. From a social care perspective, we also observe that screens can become an easy resource for calming, entertaining or switching off, but they do not always support emotional or social development. That is why setting limits is not about banning screens, but about caring for children.

Beyond the eyes

The impact of screens is not limited to eyesight. When their use continues late into the evening or digital activities follow one another without control, essential routines such as sleep, concentration and self-regulation may be disrupted. And when sleep suffers, everything else suffers a little more: mood, attention in the classroom, tolerance of frustration and even the willingness to move and play. The Childhood and Screens Guide emphasises precisely this idea of overall health.

There is also a silent but important factor: the loss of opportunities. Every hour spent in front of a screen is an hour less for imaginative play, conversation, shared reading or contact with the surrounding environment. The aim is not to make families feel guilty, but to provide them with guidance. When a digital routine takes up too much space, children’s development may be displaced by stimulation that is fast-paced but not particularly enriching.

Limits that make a positive difference

Setting limits works best when adults lead by example and act consistently. This means establishing clear schedules, creating screen-free spaces and adapting screen use to the child’s age and the context. It also means preventing screens from becoming established during the most sensitive moments: before bedtime, during meals or in spaces that should encourage connection and conversation. In practice, both visual and emotional health benefit from regular routines and breaks.

The good news is that families do not need to achieve perfection, but rather to act with sound judgement and consistency. Small changes —more outdoor play, more rest and fewer screens used as an automatic solution— can have a major impact. When we teach healthy digital habits, we are not simply talking about rules: we are protecting children’s eyesight, sleep, attention and quality of life. Ultimately, this means taking a preventive approach with a human perspective.

You can consult the Foundation’s guide here.