2012, Number 1
Biometric Calculation and Refractive Results. A Study of 250 Cases of Patients Operated for Cataract
PDF size: 58.98 Kb.
ABSTRACTBackground: 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.
Ricardo Suárez FR, Álvarez Cancio M, Batista Hernández L, Carballo Hechavarría B, González Leyva M. Exactitud del cálculo del lente intraocular en pacientes del Centro Oftalmológico de Lara. Correo Med Cient Holguín[revista en Internet]. 2009[citado 23 Ene 2010];13(3):[aprox. 8 p.]. Disponible en: http://www.imbiomed.com.mx/1/1/articulos.php?method=showDetail&id_articulo=59959&id_seccion=2082&id_ejemplar=6057&id_revista=64.
14.Hernández Silva JR, Padilla González CM, Ramos López M, Ríos Cazo R, Río Torres M. Personalización de las fórmulas del cálculo de la lente intraocular. Rev Cub Oftalmol[revista en Internet]. 2004[citado 23 Ene 2009];17 (2):[aprox. 15 p.]. Disponible en: http://bvs.sld.cu/revistas/oft/vol17_2_04/oft07204.htm.