Caracterización de los parámetros biométricos oculares de pacientes colombianos candidatos a cirugía de catarata

Introduction: The calculation of the intraocular lens (IOL) power, based on ocular biometry, is a determinant for the success of cataract surgery.Objective: To characterize the ocular biometric parameters of Colombian patients over 40 years old who are cataract surgery candidates and to determine the prevalence of the 9 clinical conditions proposed by Holladay according to the interaction between axial length (AL) and anterior chamber depth (ACD).Materials and methods: Analytical cross-sectional study. The results of ocular biometry in 781 patients (831 eyes) that were going to be taken to cataract surgery between January 2014 and January 2015 in Medellin, Colombia, were reviewed. After applying the exclusion criteria, 716 eyes were included for analysis. Data on age, sex, AL, keratometry (flat keratometry (K1) and steep keratometry (K2)), ACD and white-to-white distance were collected. Results are presented by means of descriptive statistics.Results: Most eyes were from women (62.3%). The mean values of AL, K1 and ACD were 23.37±1.51mm, 43.52±2.06 and 3.03mm±0.41, respectively. Mean AL in men was 23.62±1.37mm, and in women, 23.21±1.67mm. The highest mean AL was observed in patients <50 years old (23.84±2.41) and the lowest in patients ≥80 years old (22.96±1.03 mm). Regarding eye size according to their AL, 90.5% were normal, 4.89% long, and 4.61% short.Conclusions: 85% of the participants had normal biometric parameters. For the remaining 15%, it is necessary to take some precautions when calculating IOL power, such as using fourth-generation formulae like Holladay 2 in long eyes, because the same refractive behavior will not be obtained using traditional prediction formulae in these patients. Furthermore, according to the Holladay classification, excluding normal eyes, the most frequent eyes were those with myopia and axial hyperopia.