BACKGROUND To assess the constants and formula for aphakia correction with iris-claw IOLs to achieve the best refractive status in cases of late in-the-bag IOL complex dislocation. METHODS A literature search was performed. The following data were obtained: Iris-claw IOL model, Iridal or retroiridal enclavation, A-constant, ultrasound or optical biometry, formula employed and refractive outco...

To assess the accuracy of routine preoperative biometry we reviewed all cases of extracapsular cataract extraction with posterior chamber implant performed at Queen Alexandra Hospital in 1985. Of 471 eyes included in the survey 67.9% were within 1.0 D of the expected refraction and 90.7% within 2.0 D. Factors influencing accuracy are discussed. The necessity of routine preoperative biometry is ...

OBJECTIVES The purpose of this study was to test the hypothesis that a formula incorporating 3-dimensional (3D) fractional thigh volume would be superior to the conventional 2-dimensional (2D) formula of Hadlock et al (Am J Obstet Gynecol 1985; 151:333-337) for predicting birth weight and macrosomia. METHODS We conducted a prospective cohort study of pregnancies complicated by pregestational ...

The background to the installation of a digital computer at the Rowett Research Institute is that there has been a Biometry Department since 1948. The function of this department has evolved naturally over the years until before the acquisition of the computer when it consisted of two scientific officers, one experimental officer and three machine operators. Over the last 15 years or so it has ...