A new perimeter using the preferential looking response to assess peripheral visual fields in young and developmentally delayed children.

Purpose: To compare the sensitivity, specificity, and interpretability of a newly developed semiautomated static perimeter based on the preferential looking response to the results of confrontation visual field testing in a group of young and/or developmentally delayed children with and without visual field deficit.

Methods: The preferential looking perimeter (PLP) uses observation of the child's natural eye movement response to an appearing target to determine the peripheral visual field. We compared preferential looking perimetry to confrontation testing in 74 children 3-10 years of age (mean, 6.