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.

The Sonksen logMAR Test of Visual Acuity: I. Testability and reliability.

Purpose: To develop a standardized logMAR test of visual acuity for young children and establish testability and reliability.

Methods: Two thousand nine hundred ninety-one children, aged 2 to 8 years 6 months, from a population sample of 4671 were recruited from schools and preschool facilities and tested. Ability to name or match letters, accept occlusion, and achieve binocular single and binocular and monocular measures of linear visual acuity were recorded.

The Sonksen logMAR test of visual acuity: II. Age norms from 2 years 9 months to 8 years.

Purpose: To establish age norms and interocular differences in visual acuity between 2 years 9 months and 8 years for the Sonksen logMAR Test.

Methods: Cross-sectional population-based study. Binocular measures of linear visual acuity were achieved in 2,940 children and monocular measures were achieved in 2,820 right eyes and 2,821 left eyes, respectively.