Resumen

ZAMORA GALINDO, Inés et al. Biometric Calculation and Refractive Results. A Study of 250 Cases of Patients Operated for Cataract. Medisur [online]. 2012, vol.10, n.1, pp.22-26. ISSN 1727-897X.

Background: the implantation of intraocular lenses in cataract surgery represents a step forward in refractive correction of aphakia. Nevertheless, without a study prior to surgery and the correct calculation of the intraocular lens, the results would not be satisfactory. Objective: To evaluate the biometric calculation and postoperative refraction in patients who underwent cataract surgery. Methods: A descriptive study was conducted in the Ophthalmology Center of the State of Anzoategui in Venezuela. It included 250 patients who underwent cataract surgery with previous refraction, keratometry, biometry and intraocular lens power calculation. After surgery, the following parameters were determined: biometrically calculated expected refraction, postoperative refractive error, uncorrected visual acuity and postoperative correction. Results: In general, females and patient between 60 and 69 years old predominated. The most commonly recorded value for keratometry ranged from 43 to 44 D. For axial length, values ranged from 22 to 24 mm. Most commonly used intraocular lenses were from 16 to 20 diopters and from 21 to 25 diopters. The largest percent of expected refraction was obtained in the group from 0.00 to 0, 50. Refractive error was predominant from 0.50 to 1.00. In the refraction performed without glasses one month after surgery, more than half of patients had vision between 20/30 and 20 / 25. Conclusions: We demonstrated the effectiveness of intraocular lens calculation prior to cataract surgery.

Palabras clave : biometry; refractometry; lenses, intraocular; cataract extraction.

        · resumen en Español     · texto en Español     · Español ( pdf )