United Kingdom, June 29 -- A landmark review of global research has warned that regular screen time for babies and toddlers under the age of two is linked to a range of potential long-term health and developmental risks.

The study, described by researchers as the most comprehensive review of the evidence to date, concludes that infants under two should not receive "regular intentional screen time" and calls for the UK government to reconsider parts of its guidance for parents.

Researchers from the universities of Leeds, Leeds Trinity, Loughborough and Aston said growing reliance on smartphones, tablets and other digital devices during infancy represented a significant policy "blind spot".

Rafe Clayton, senior lecturer in media and comm...