Revista Cubana de Oftalmología
versão ISSN 0864-2176
BALLATE NODALES, Edith M et al. Effective clinical position of the intraocular lens and other variables associated to the residual spheral defect. Rev Cubana Oftalmol [online]. 2011, vol.24, n.2, pp. 239-247. ISSN 0864-2176.
Objective: To assess the relation between the clinical effective position of lens and other variables reflecting the characteristics of the eye with residual spherical defect. Methods: Aprospective, longitudinal, descriptive and observational study was conducted in 103 eyes from patients operated on of senile cataract between May and November, 2006. The following variables were assessed: residual spherical defect, clinical effective position of intraocular lens (measurement by ultrasound biomicroscopy), eye characteristics (preoperative astigmatism and axial length). Results: There was a significant residual refractive spherical defect (in absolute value) when the effective positive of lens is in sulcus, as well as a marked difference compared with the sac position. In univariate analysis there was a great correlation (p< 0,001) between the preoperative astigmatism degree and the residual spherical defect. There is obvious trend to increase of residual spherical defect (in absolute value) as the anterior chamber depth decreases, with a significant correlation (p< 0,001). There was not a significant correlation between the residual spherical defect and axial length. The multivariate assessment was appropriate with a R2= 0,52 (high regression rate) meaning that 52 % of variation of residual spherical defect is due to these variables. Conclusions: Continuous circular capsulotomy favours the IOL within the capsular sac and thus gives rise to better residual refractive results. The preoperative astigmatism the anterior chamber depth are related to residual spherical defect. The lesser the preoperative astigmatism and the greater the anterior chamber depth, the better the refractive result.
Palavras-chave : Ultrasound biomicroscopy; intraocular lens; residual spherical defect.