Background: Lens thickness is one of the factors that influence mechanism acute primary angle closure glaucoma (PACG). The thicker lens usually results in a shallower anterior chamber (ACA), and gradual progressive increase with age exaggerated shallowing ACA. Because has an important role PACG mechanism, prophylactic treatment like extraction might prevent early stages. This study aimed to des...

The aim was to determine how visual acuity is affected by myopia when optical factors of the eye are controlled. Grating acuity was measured with interference fringes to avoid the effects of aberrations, and ocular biometry was used to compensate for differences in retinal image size among subjects. Distance spectacle refractions ranged from +2.25 to -14.75 D. The retinal magnification factor (...

PURPOSE To determine the dependency of straylight on ocular biometry. METHODS This prospective study included 518 eyes of 277 volunteers of diverse ethnic backgrounds with healthy eyes of various iris colors. The eyes had retinal straylight tested using a commercial psychophysical device. Ocular axial length and refraction were also measured with an ocular biometer and an autorefractometer, r...

PURPOSE To evaluate ocular biometric parameters and darkroom prone provocative test (DPPT) in family members of primary angle closure (PAC) glaucoma (PACG) patients and to establish any correlation between these biometric parameters and the DPPT response. METHODS Seventy-four family members of PACG patients underwent ultrasound ocular biometry, slit lamp biomicroscopy, Goldmann applanation to...

To analyze the components of young Chinese eyes with special attention to differences in corneal power, anterior segment length and lens power. Cycloplegic refractions and ocular biometry with LENSTAR were used to calculate lens power with Bennett's method. Mean refraction and mean values for the ocular components of five different refractive groups were studied with ANOVA and post-hoc Scheffé ...

The Textbook of Contraceptive Practice is a current overview of population control. The authors are John Peel, Senior Lecturer in Sociology, University of Hull and Malcolm Potts, Director of Medical Studies, Sidney Sussex College, Cambridge. Individual chapters cover the various methods: the oral contraceptives, intrauterine devices, withdrawal, diaphragm, spermicides, safe period, sterilizatio...

The term biometry is derived from the Greek words ‘bios’ (life) and ‘metron’ (measure). In the broader sense, biometry can be defined as the measurement of body characteristics. With this non-technological meaning, this term has been used in medicine, biology, agriculture and pharmacy. For example, in biology, biometry is a branch that studies biological phenomena and observations by means of s...

introduction: correct interpretation of kidney images requires the knowledge of its normal size. this study aimed to establish normal values for kidney length and parenchymal thickness and identify the potential related factors in a group of iranian adults. methods: renal dimensions, including length and parenchymal thickness were measured by sonography in 103 individuals with no renal disease....

background: it has been estimated that 67 million people worldwide are affected with a primary glaucoma and that one-third have primary angle closure glaucoma. we aimed to determine the biometric differences between the eyes of patients with acute attack of primary angle closure and their non-involved fellow eyes.   methods: twenty eight patients with acute attack of primary angle closure were ...