RESUMEN
PURPOSE: Retrospective evaluation of PC IOL power calculation accuracy and comparison of the refractive errors after ECCE resulted from different methods of calculation. MATERIAL AND METHODS: The PC IOL power in 100 eyes with senile cataract without significant refractive errors, was calculated using SRK II formula with two different biometers and based on primary refraction. The final IOL power was established by surgeon based on all mentioned calculations (surgeon choice). Half a year after surgery the refractive error was measured. The proper IOL power, which did not require additional correction, was calculated (ideal lens). RESULTS: 48 eyes did not require any distance correction. In 44 eyes small hyperopia (to +2.0 D) appeared and in 8 eyes myopia (to -1.5 D). The smallest error was made in cases where we implanted lenses according to surgeon choice. The average power of ideal lens was 20.32 D. We observed statistically significant difference between both ultrasound biometers. CONCLUSIONS: The most accurate results were achieved in cases where IOL power was chosen by the surgeon based on SRK II formula and primary refraction. Possible source of errors can be inadequate indications of biometers.
Asunto(s)
Extracción de Catarata/métodos , Lentes Intraoculares , Errores de Refracción/diagnóstico , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Análisis de Regresión , Estudios Retrospectivos , Factores de Tiempo , Agudeza VisualRESUMEN
The authors evaluated 52 glaucomatous eyes in which, after the extracapsular cataract extraction, artificial posterior lens has been implanted. In 32 patients glaucoma has been treated for 2-6 years. In 7 patients of this group, it was not possible to control the intraocular pressure before surgery and in these cases simultaneous trabeculectomy, extracapsular cataract extraction and the implantation of artificial posterior lens were performed. In 13 patients, anti-glaucomatous surgery had been performed before, and in 7 cases, glaucoma was diagnosed in the preoperative period. We considered our results as satisfactory since in 67% visual acuity was over 0.5; 29% of the patients did not require anti-glaucomatous treatment, whereas 71% took anti-glaucomatous drugs in reduced doses. In our opinion, glaucoma is not a contraindication for artificial lens implantation, although surgery can be technically more difficult.