Prevalence of refractive errors; the yazd eye study.

Purpose: To determine the prevalence of refractive errors in Yazd, central Iran.

Methods: This population-based study was performed in 2010-2011 and targeted adults aged 40 to 80 years. Multi-stage random cluster sampling was applied to select samples from urban and rural residents of Yazd.

A population-based survey of the prevalence and types of glaucoma in central Iran: the Yazd eye study.

Purpose: To describe the prevalence and types of glaucoma in Yazd, central Iran.

Design: Population-based, cross-sectional study.

Participants: Iranian adults aged 40 to 80 years, residing in Yazd, Iran, in 2010 and 2011.

The Yazd Eye Study-a population-based survey of adults aged 40-80 years: rationale, study design and baseline population data.

Purpose: To describe the rationale, methodology and baseline data of the Yazd Eye Study, a study in the urban and rural areas of Yazd, a district in the center of Iran.

Methods: This population-based cross-sectional study included adults aged 40-80 years from the non-institutionalized population of the Yazd district, in 2010-2011. Using multi-stage, systematic cluster random sampling and a probability proportional to size strategy, 58 clusters of 40 subjects were selected from 251 clusters in different enumeration areas.