This is the protocol for a review and there is no abstract. The objectives are as follows:
To assess and compare the accuracy of tests, alone or in combination, for screening for strabismus in children aged one to six years, in a community setting by lay screeners or primary care professionals.
Other objectives will be to investigate sources of heterogeneity of diagnostic accuracy, including:
type of professionals performing the test;
study size (< 100 vs. ≥ 100 participants, which may reflect the adoption of different sampling strategies);
variation in the way a test is carried out;
type of strabismus (convergent vs. divergent, horizontal/vertical);
severity of strabismus (amount of misalignment, constant/intermittent/latent);