Wy­stę­po­wa­nie­ nad­wzrocz­no­ści­ wśród­ uczniów­ w ­wie­ku­ od ­6 do 18 ­lat

Introduction
To determine the prevalence of hyperopia among students ranging from 6 to 18 years of age.

Material and methods
5023 students from elementary schools, junior high schools and high schools, aged 6-18 years were examined. Measurements of visual acuity as well as retinoscopy after cycloplegia have been carried out. The data was analyzed using chi-square test, u-test and Student's t-test.

Results
It was found that 21% of the students, aged from 6 to 18 suffers from hyperopia. It has been observed that from the sixth to the eighteenth years of life along with the age decreases the prevalence of hyperopia. A major decrease in the frequencey of hyperopia occurrence among students aged between 6 and 9 years old as well as among those aged 16 and older, has been found. Significant differences between prevalence of hyperopia among boys and girls was not observed.