In part I we discussed the solution of corneal curvature using a 2D meshless method based on radial basis functions (RBFs). In Part II we use these methods to fit a full nonlinear thin membrane model to a measured data-set in order to generate a topological mathematical description of the cornea. In addition, we show how these results can lead to estimations for corneal radius of curvature and ...

We reviewed the SRK-II method and introduce a new equation to calculate the intraocular lens (IOL) power for eyes which underwent laser phototherapeutic keratectomy (PTK). The Gullstrand series was used to determine the power and the radius of curvature of planoconvex IOLs which alter the focal point from the cornea to reach the conjugate point on the retina. The radius of anterior corneal curv...

Our purpose is to correct digital CCD-recorded Scheimpflug photographs, imaging both the anterior and posterior corneal surface, the anterior chamber, and the anterior eye lens surface for optical distortions. In a ray-tracing algorithm the imaging of the posterior corneal surface in a given Scheimpflug photograph is corrected by applying Snell's law on parallel incident rays entering through t...

The main objective of this work is to demonstrate the relation between corneal surface imperfections and retinal image imperfections. Its originality resides on the fact that specialized literature approximate the eye and the cornea as mathematical surfaces to explain simple refraction problems (myopic, hyperopic, astigmatic), whereas in the present work we have used topographic data for in viv...

PURPOSE To comprehensively assess the reliability of automated Pentacam (Oculus, Inc.) measurements. SETTING Flinders Eye Centre, Flinders Medical Centre, Bedford Park, South Australia, Australia. METHODS Both eyes of 35 normal volunteers were tested twice on the same day by 2 different observers. All automated values were recorded, and manual analysis of topographic maps was performed only...

PURPOSE To evaluate the changes occurring in the cornea, anterior segment anatomy, and intraocular pressure (IOP) in pregnant women. SETTING Department of Ophthalmology, Assaf Harofeh Medical Center, Zerifin, Israel. DESIGN Prospective single-center comparative study. METHODS The Ocular Response Analyzer dynamic bidirectional applanation device and the Pentacam HR Scheimpflug imaging syst...

Purpose. To determine the corneal biomechanical properties by using the Ocular Response Analyzer™ and to investigate potential factors associated with the corneal biomechanics in healthy myopic subjects. Methods. 135 eyes from 135 healthy myopic subjects were included in this cross-sectional observational study. Cornea hysteresis (CH), corneal resistance factor (CRF), cornea-compensated intraoc...

Aim: This study focused on exploring the effects of refractive error and its association with various corneal parameters such as curvature (CC), thickness (CT), endothelial cell density (ECD), volume (CV) among young adults in Saudi Arabia.

To study and determine the relationship between eye axial length corneal radius of curvature, as entire advancements in medicine have originated from basic studies. The goal research is to average size different parts body their relationship.

PURPOSE To describe topographic changes in a case of limbal conjunctival carcinoma. METHODS Corneal topography was performed before and 3 months after excision. RESULTS Preoperative topography revealed a localized flattening (37.1 diopters [D]) adjacent to the tumor and extending to the corneal apex, causing a 3-diopter asymmetric with-the-rule astigmatism. Preoperative corneal curvature wa...