Intrasession and intersession repeatability of the Pentacam system on posterior corneal assessment in the normal human eye

Abstract

Pentacam provided good performance in assessing the posterior cornea. To improve the intersession repeatability, it is suggested that 3 consecutive readings, rather than 1 image, be taken to generate an average BFS for analysis. When comparing the posterior corneal elevation between sessions, an average BFS generated from the first visit should be used for elevation calculation.

Can retinoscopy keep up in keratoconus diagnosis?

“…examination of non-compliant patients, children, disabled patients or lack of high-tech instruments, retinoscopy is still a powerful technique for the diagnosis of keratoconus and should not be considered anachronistic. Tomography systems, such as Pentacam, are used for many years and explored by numerous researchers, either alone or in comparison with other devices [10][11][12][13][14]. The ORA and the Corvis (Oculus Optikgeräte GmbH, Heidelberg, Germany) are relatively new instruments to Fig.…”

Corneal changes following short-term miniscleral contact lens wear

“…A total of 5 error-free measurements were captured using the 25 Picture 3D scan mode, which provides 25 cross-sectional images of the anterior eye. This instrument has been shown to be highly repeatable for measures of central [19] and peripheral [19,20] corneal thickness and anterior [21] and posterior [22] corneal topography including subtle corneal changes following contact lens wear [23], while reports concerning the repeatability of anterior higher order corneal aberrations vary depending on the individual aberrations examined [24,25].…”

Effects of pterygium surgery on front and back corneal surfaces and anterior segment parameters

“…Pentacam is distinguished from other topographic systems by its ability to evaluate the entire anterior eye segment in a single scan without contact with the cornea. Pentacam has been utilized to measure various parameters including corneal curvature and elevation at the front and back surfaces [15][16][17][18], corneal thickness [19,20], anterior chamber depth (ACD) and other anterior segment parameters including anterior chamber volume (ACV) and anterior chamber angle (ACA) [21][22][23][24]. However, no study has used Pentacam for investigating the effects of pterygium and its excision on the front and back corneal surfaces and anterior segment parameters.…”