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2005, 51, 1, 33-36

DAMIAN CZEPITA, WOJCIECH GOSŁAWSKI, ARTUR MOJSA

OCCURRENCE OF REFRACTIVE ERRORS AMONG STUDENTS WHO BEFORE
THE AGE OF TWO GREW UP UNDER THE INFLUENCE OF LIGHT EMITTED
BY INCANDESCENT OR FLUORESCENT LAMPS

Katedra i Klinika Okulistyki Pomorskiej Akademii Medycznej
al. Powstańców Wlkp. 72, 70-111 Szczecin
Head: Prof. Danuta Karczewicz, M.D., D.M.Sc. Habil.

Summary
Purpose: The aim of the study was to determine whether the development of refractive errors could be associated with exposure to light emitted by incandescent or fluorescent lamps.
Material and methods: 3636 students were examined (1638 boys and 1998 girls, aged 6-18 years, mean age 12.1, SD 3.4). The examination included skiascopy with cycloplegia. Myopia was defined as refractive error ≤ -0.5 D, hyperopia as refractive error ≥ +1.5 D, astigmatism as refractive error > 0.5 DC. Anisometropia was diagnosed when the difference in the refraction of both eyes was > 1.0 D. The parents of all the students examined completed a questionnaire on the child’s light exposure before the age of two. Data were analyzed statistically with the χ2 test. P values of less than 0.05 were considered statistically significant.
Results: It was observed that sleeping until the age of two in a room with a light turned on is associated with an increase in the occurrence of anisometropia (p < 0.02) as well as with a reduction in the prevalence of emmetropia (p < 0.05). It was also found that light emitted by fluorescent lamps leads to more frequent occurrence of astigmatism (p < 0.01).

K e y w o r d s: incandescent lamps – fluorescent lamps – refractive errors.
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