Qualitative results Experiments Conclusion Problem: fragmentation, tortuosity and SNR are severe challenges for curvilinear structure detectors. Key contribution: new ridge detector, SCIRD: orientation, scale, contrast and curvature invariant. Results: SCIRD outperforms state-of-theart HCFs on corneal nerve fibres and neurites data sets. Future: to combine SCIRD with context filters (R. Annunzi...

PURPOSE To compare the distributional parameters for a series of ocular biometric traits between twins and their singleton siblings, to evaluate the generalizability of twin data, as used in heritability analyses to the general population. METHODS A series of birth, anthropometric, and 13 ocular biometric traits were selected for analysis: interpupillary distance (IPD), visual acuity (logMAR)...

PURPOSE In the Hirschberg eye position test, the ratio of strabismic angle to decentration of the corneal reflex is dependent on two biometric parameters of the eye: the radius of the corneal curvature and the depth of the anterior chamber. This study was designed to confirm whether the Hirschberg conversion ratio (HR) previously determined for adults can be used for children of various ages de...

PURPOSE To compare the changes in posterior corneal curvature using scanning slit topography (Orbscan II) and Scheimpflug imaging (Pentacam) before and after Epi-laser in situ keratomileusis (LASIK) for myopia. METHODS In a prospective observational case-series study, 20 myopic patients having undergone Epi-LASIK were examined serially with two different devices, Orbscan II and Pentacam, preo...

PURPOSE To analyze single session, intrauser reliability of a Scheimpflug device for anterior chamber (AC) and corneal parameters. METHODS In this observational study, 100 normal candidates underwent Scheimpflug analysis with Sirius 3D Rotating Scheimpflug Camera and Topography System (Costruzione Strumenti Oftalmici, Italy). Two scans in dark room conditions were performed by the same experi...

METHODS: This prospective non-comparative interventional case series comprised eight eyes of eight patients with high residual astigmatism after keratoplasty, who had Keraring® ICRS implantation aided by femtosecond laser (FL). We evaluated uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), refractive astigmatism and corneal maximum (Kmax) and minimum curvature (Kmin) at one...

Purpose To assess the predictive accuracy of simulation-based LASIK outcomes. Methods Preoperative and 3-month post-LASIK tomographic data from 20 eyes of 12 patients who underwent wavefront-optimized LASIK for myopia were obtained retrospectively. Patient-specific finite element models were created and case-specific treatment settings were simulated. Simulated keratometry (SimK) values and t...

PURPOSE To examine characteristics of ocular hypertensive subjects and potential associations with estimated cerebrospinal fluid pressure (estCSFP). METHODS The population-based Beijing Eye Study 2011 included 3468 individuals with a mean age of 64.6±9.8 years. Ocular hypertension was defined as intraocular pressure (IOP) >21 mmHg, normal optic nerve head appearance and normal retinal nerve f...

PURPOSE The aim of this study was to assess the efficacy of accelerated crosslinking (irradiance of 9 mW/cm; 10 minutes) in keratoconus-affected eyes through topographical, visual, and refractive end points. METHODS Mild-moderate keratoconus-affected eyes that underwent accelerated corneal collagen crosslinking (CXL) treatment and had 6 and 12 months of follow-up were reviewed retrospectively...

This study aimed to characterize corneal accommodation in alert chicks with and without experimentally-induced astigmatism. Refraction and corneal biometry were measured in 16 chicks with experimentally-induced astigmatism (>1.00 D) and 6 age-matched control chicks (astigmatism ⩽ 1.00 D). Corneal accommodation was detected using a Placido-ring based videokeratography system, by measuring change...