Association of Maternal and Paternal Astigmatism With Child Astigmatism in the Hong Kong Children Eye Study.

Importance: Parental astigmatism is a factor associated with risk for development of child astigmatism; however, the magnitude of the association has not been determined.

Objective: To determine the association between parental and child astigmatism.

Design, Setting, And Participants: This population-based, cross-sectional study included participants from familial trios, each comprising a child aged 6 to 8 years and both parents, recruited from the Hong Kong Children Eye Study.

Differential compensatory role of internal astigmatism in school children and adults: The Hong Kong Children Eye Study.

Background: To compare the prevalence of refractive (RA), corneal (CA), and internal astigmatism (IA) in Hong Kong children and adults and evaluate the role of IA in compensating for total astigmatism and its relations to myopic traits.

Methods: The Hong Kong Children Eye Study is a population-based cross-sectional study. Totally 3704 school children (mean age 7.