Evaluation of refractive status and optical components in eyes of school-aged children born prematurely

Purpose: To evaluate the visual function and determine the factors associated with the development of refractive errors in school-aged children born prematurely. Material and methods: One hundred and seventeen children with gestational age less than 37 weeks that were born between 1 January 2006 and 31 December 2007 were included. For statistical purpose, participants were divided into groups according to gestational age and birth weight (BW). All made a complete ophthalmic examination and measurement of optical components. Results: There was no statistically significant increase of refractive errors in children born more prematurely (p>0.05), although the value of the spherical equivalent was greater for children with BW 2000 g was due to an increased axial length. Children with ROP had more prevalence of refractive errors compared with those without ROP (p=0.004). Conclusions: Children born more prematurely and those with ROP appear to be at increased risk of developing refractive error and strabismus, which can persist throughout life. In these children, refractive error seems to be most affected by corneal curvature than by axial length.