Can information on the purpose of spectacle use and age at first use predict refractive error type?

Purpose: To assess the sensitivity and specificity of predicting refractive error type using information from a four-item questionnaire on the purpose of spectacle use and age at first use.

Methods: The Sydney Myopia Study examined 1,740 year 1 (78.9% response) and 2,353 year 7 students (75.

Impact of amblyopia on vision at age 12 years: findings from a population-based study.

Aims: To report prevalence of amblyopia and long-term impact of its treatment on vision in a population-based sample of 12-year-old Australian children.

Methods: Logarithm of minimum angle of resolution (logMAR) visual acuity (VA) was measured in 2353 children (response rate 75.3%); visual impairment was defined as VA<6/12.

Factors associated with a previous diagnosis of strabismus in a population-based sample of 12-year-old Australian children.

Purpose: To describe the prevalence of strabismus and factors associated with its diagnosis in a representative sample of older Australian children.

Design: Cross-sectional, population-based study.

Methods: A representative stratified random cluster sample of 2353 children (aged 12 years) attending 21 secondary schools in Sydney, Australia was examined in 2004 to 2005 (response 75.

Patterns of eyecare utilization by young Australian children: findings from a population-based study.

Objectives: To report factors associated with childhood eyecare utilization in a random sample of 1740 Sydney schoolchildren aged 6, examined during 2003-4.

Methods: Information on use of eyecare services, defined as any previous consultation with an ophthalmologist or optometrist, was sought from parents. Children had comprehensive eye examinations, including visual acuity (VA), cover testing, cycloplegic refraction and dilated fundus examination.

Correctable and non-correctable visual impairment in a population-based sample of 12-year-old Australian children.

Purpose: To document the prevalence of correctable and non-correctable visual impairment in a representative sample of Australian children, predominantly age 12 years.

Design: Population-based cross-sectional study.

Methods: Logarithm of the minimum angle of resolution (logMAR) visual acuity was measured in both eyes unaided, with spectacles if worn, and after subjective refraction if required, in 2353 children, examined during 2004 to 2005.

Methods for a population-based study of myopia and other eye conditions in school children: the Sydney Myopia Study.

Purpose: The Sydney Myopia Study will establish the prevalence of myopia and other eye diseases in a large representative sample of Sydney school children. It will also examine the relationship between myopia and potential modifiable risk factors and will assess potential gene-environment interactions by examining parents and siblings.

Methods: The target population is a stratified random cluster sample of 1750 Year 1 (age 6 years) and 1500 Year 7 (age 12 years) students from Sydney metropolitan schools.