The purpose of this study was to evaluate the increased prevalence of myopia among patients in different periods in an ophthalmologic hospital in Goiania. There has been an increase of myopia prevalence around the world especially in some Asian countries. The investigators intend to analyze if this growing tendency is also present in our hospital, and if it exist how much is this growth.

There were compared data collected in two scientific studies carried out in the same ophthalmologic hospital in different periods of time, they evaluated among other factors, the refractive errors of the participants, from this data there were compared the percentage of patients with myopia between the two studies. And analysed how much was the grown of myopia

Inclusion Criteria:

• Patients between 2 and 20 years assessment of Project "Olhar Brasil"
• Patients between 2 and 40 years assessment of Project "Boa visão"

Exclusion Criteria:

• The patients wasn't assessment of Project "Olhar Brasil"
• The patients wasn't assessment of Project "Boa Visão"

16.806 students from municipal schools of Goiânia during the period October 1995 to December 2000 In the second study there were selected 165 children from 2 to 14 years old who were referred to the Institute of Goiânia eyes, look at Brazil project within the school environment. The Look Brazil project aims to identify vision problems related to refraction.