BACKGROUND To evaluate ocular biometric parameters in different subtypes of acute angle closure and compared to fellow eyes of AAC and PACS eyes. METHODS This is a retrospective chart review study. A total of 167 eyes (96 patients) consisting of 71 AAC eyes, 71 fellow eyes of AAC, and 25 PACS eyes were recruited. All patients underwent ocular examination and biometry. The mechanism of AAC was...

PURPOSE Scheimpflug imaging allows quantitative analysis of the width of the anterior chamber angle. We report the population-based distribution of the anterior chamber angle width using this noncontact imaging technique and investigate associated factors. METHODS A population-based cross-sectional study was carried out in Germany. A comprehensive ophthalmologic examination including refracti...

Purpose This study investigated the anterior ocular anatomic origin of high-order aberration (HOA) components using optical coherence tomography and a Shack-Hartmann wavefront sensor. Methods A customized system was built to simultaneously capture images of ocular wavefront aberrations and anterior ocular biometry. Relaxed, 2-diopter (D) and 4-D accommodative states were repeatedly measured i...

Variations in ocular anatomy form the basis of understanding the development and management of ocular disease, and help to determine associations between anatomy and disease. Epidemiological studies have found associations between ocular anatomy and the pathogenesis of disease, such as higher rates of angle-closure glaucoma in Alaskan Eskimos and higher incidence of myopia in Chinese. A recent ...

Purpose: To determine the relationship between refractive errors and ocular components values in carpet weavers Methods: Refractive errors and ocular components values were investigated in carpet weavers at Mashhad city in Iran. After selection of samples, the individuals who had ophthalmic and systemic disease effective on the refractive errors were excluded from the study. Refractive errors a...

Background: A new commercially available device (IOLMaster, Zeiss Instruments) provides high resolution non-contact measurements of axial length (using partial coherent interferometry), anterior chamber depth, and corneal radius (using image analysis). The study evaluates the validity and repeatability of these measurements and compares the findings with those obtained from instrumentation curr...

PURPOSE To evaluate the error in the estimation of axial length (AL) with the IOLMaster partial coherence interferometry (PCI) biometer and obtain a correction factor that varies as a function of AL and crystalline lens thickness (LT). METHODS Optical simulations were produced for theoretical eyes using Zemax-EE software. Thirty-three combinations including eleven different AL (from 20mm to 3...