Amplitude of Accommodation in Schoolchildren.

Purpose: Hofstetter's equations are based on studies of Amplitude of Accommodation (AA) with methodological limitations, particularly in the case of children younger than 10 years of age. The aim of this study is to evaluate AA by age, gender, economic status, and time of day as well as accommodative insufficiency prevalence.

Methods: A cross-sectional study was conducted with 867 schoolchildren aged 6-16 years attending two public schools in the urban area of the South Brazilian city of Pelotas.

Asthenopia in schoolchildren.

Objective: To assess asthenopia prevalence and associated factors in schoolchildren aged 6-16.

Methods: This was a cross-sectional study of all children attending the first to eighth grades at two public schools in the urban region of a medium-sized town in Southern Brazil between April and December 2012. A questionnaire on socioeconomic and cultural matters was answered by parents, while the children answered a questionnaire on asthenopia-related symptoms.

Moderate hyperopia prevalence and associated factors among elementary school students.

Hyperopia is the most common refractive condition in childhood. There are few studies on moderate hyperopia and associated factors. This study aims to investigate the prevalence of moderate hyperopia and associated factors among school children.

Prevalence of asthenopia in children: a systematic review with meta-analysis.

Objective: To estimate the prevalence of asthenopia in 0-18 year-old children through a systematic review and meta-analysis of prevalence studies.

Sources: Inclusion criteria were population-based studies from 1960 to May of 2014 reporting the prevalence of asthenopia in children. The search was performed independently by two reviewers in the PubMed, EMBASE, and LILACS databases, with no language restriction.

Hyperopia: a meta-analysis of prevalence and a review of associated factors among school-aged children.

Background: Studies show great variability in the prevalence of hyperopia among children. This study aimed to synthesize the existing knowledge about hyperopia prevalence and its associated factors in school children and to explore the reasons for this variability.

Methods: This systematic review followed PRISMA guidelines.

[Prevalence of Chagas disease among pregnant women in the southern region of Rio Grande do Sul].

Anti-Trypanosoma cruzi antibodies in the umbilical cord of 351 parturients in the city of Pelotas, Rio Grande do Sul were investigated to determine the prevalence of Chagas disease among pregnant women. One case was identified (0.3%), without detection of congenital transmission.

[Shortage of ocular health care in the public system: a population-based study].

This cross-sectional population-based study investigated the prevalence of eye care services utilization and the association with socioeconomic and demographic factors, need for health care, and type of service payment. The study evaluated 2,960 adults aged 20 and older. In the previous 5 years, 46% of the sample and 30% of those aged 50 and older had not visited an eye care service.