Abstract

SANTIESTEBAN GARCIA, Imalvet et al. Effectiveness of the intraocular lens power calculation using the partial coherent interferometry. Rev Cubana Oftalmol [online]. 2010, vol.23, n.1, pp. 88-99. ISSN 1561-3070.

OBJECTIVE: to compare the effectiveness of the intraocular lens dioptric power calculation using IOL Master and the conventional applanation biometry. METHODS: A sample of 100 eyes (patients), diagnosed with unilateral or bilateral cataract in the preoperative consultation service, was selected through simple random sampling in the Ocular Microsurgery Center in the period from March to September, 2006. They were divided into two groups based on the method for intraocular lens calculation. The variables were preoperative mean axial length, preoperative keratometric average, expected and obtained spheral component, visual acuity without correction and better corrected visual acuity preoperatively and postoperatively. The statistical analysis of the results was made by variance analysis, Student's t test for paired mean comparisons and Chi square. The confidence level of 95 % was used. RESULTS: Among the main results, it was found that the axial length differences between IOL Master and A-Scan applanation biometry was statistically significant. Visual acuity without correction increased 4 lines and the best corrected visual acuity increased 6 lines in the postoperative period of the group I patients. Ninety percent of the group I patients, whose visual acuity was calculated with IOL Master, reached emetropia in terms of the spheral component. CONCLUSIONS: A significant difference but lower than that found in the international studies among the preoperative axial lengths calculated through ILO Master and applanation biometry were evinced. The differences were higher in the lenghts calculated by IOL Master. There was improvement in the number of lines of Snellen´s chart both in the visual acuity without correction and the better corrected visual acuity in the two groups; being better in group II. The refractive results tending to emetropy prevailed, taking into consideration the spheral component reached in both groups, which were also higher in group I.

Keywords : Partial coherence interferometry; contact biometry.

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