The increasing advancement of ophthalmic procedures such as refractive surgeries, phakic lens implantations, and the management corneal diseases has emphasized critical nature obtaining precise measurements morpho-geometric parameters associated with anterior eye segment, particularly cornea. Despite availability numerous devices capable measuring these parameters, none them can be designated a “gold standard”, making it important to objectively characterize differences in measurement...

Aims/Purpose: Amino acids have been proposed as preclinical biomarkers of the risk developing neurodegenerative and metabolic diseases. We used proton nuclear magnetic resonance (1H‐NMR) in tears for first time to investigate alterations essential amino patients with primary open‐angle glaucoma (POAG). Methods: planned an analytical pilot case‐control study 30 participants aged 40‐80 years, divided into: POAG group ( n = 11) control (CG; 19). Tears were obtained from each eye using...

To establish a new procedure for 3D geometric reconstruction of the human cornea to obtain solid model that represents personalized and in vivo morphology both anterior posterior corneal surfaces. This is later analyzed variables enabling characterization geometry establishing clinical diagnostic criterion order distinguish between healthy corneas with keratoconus.The method consists following steps: capture preprocessing spatial point clouds provided by Sirius topographer represent...

To characterize corneal structural changes in keratoconus using a new morphogeometric approach and to evaluate its potential diagnostic ability.Comparative study including 464 eyes of patients (age, 16 72 years) divided into two groups: control group (143 healthy eyes) (321 eyes). Topographic information (Sirius, CSO, Italy) was processed with SolidWorks v2012 solid model representing the geometry each cornea generated. The following parameters were defined: anterior (Aant) posterior (Apost)...

Applying a structural equations modelling methodology, the study analyses relationships and effects of self-regulated learning (social interaction strategies motivation) first-year university experiences on permanence in sophomore year. The participants are 239 students different Engineering degrees at public south-eastern Spain. Two alternative models evaluated, showing superiority model where completely mediate permanence. Motivation social show direct experiences, turn, permanence;...

There are numerous tomographic indices for the detection of keratoconus risk. When indexes based on corneal volume analyzed, two problems presented: one hand, they not very sensitive to incipient cases because locally defined in primary developmental region structural abnormalities; and other do register geometric decompensation driven by asymmetry present during disease progression. This work performed a morphogeometric modeling cornea aid CAD tools using raw topographic data (Sirius...

Purpose: To assess the diagnostic values of corneal epithelial and stromal thickness distribution characteristics in forme fruste keratoconus (FFKC) subclinical (KC). Methods: This cross-sectional study was conducted at VISSUM Innovation Miguel Hernandez University, Alicante, Spain. Twenty-seven eyes (27 subjects) with FFKC, 50 (50 KC a best spectacle corrected distance visual acuity ≥20/20 (Snellen) (grade zero according to Red Temática de Investigación Cooperativa en Salud classification),...

The aerospace sector is one of the main economic drivers that strengthens our present, constitutes future and a source competitiveness innovation with great technological development capacity. In particular, objective manufacturers on assembly lines to automate entire process by using digital technologies as part transition toward Industry 4.0. advanced manufacturing processes, artificial vision systems are interesting because their performance influences liability productivity processes....

Additive manufacturing is a vanguard technology that currently being used in several fields medicine. This study aims to evaluate the viability clinical practice of patient-specific 3D model helps improve strategies doctor-patient assistance. Data obtained from corneal topographer were make virtual by using CAD software, later print this FDM and get an exact replica each patient’s cornea consultation. Used printing software open-source, material was biodegradable its cost low. Clinic users...

This work evaluates changes in new morphogeometric indices developed considering the position of anterior and posterior corneal apex minimum thickness (MCT) point keratoconus. prospective comparative study included 440 eyes patients (age, 7-99 years): control (124 eyes) keratoconus (KC) groups (316 eyes). Tomographic information (Sirius®, Costruzione Strumenti Oftalmici, Italy) was treated with SolidWorks v2013, creating following parameters: geometric axis-apex line angle (GA-AP), axis-MCT...

This paper presents a new concept of modular system for the production and storage energy in bicycle at any speed above 9 km/h. User-Centered Design methodology was applied to establish design premises, then each component selected, developed, refined separately, carrying out all integration (hub dynamo, USB charger, batteries, solar panel) by means simple extension cable. Then, simulations were made with different software tools create candidate. A an integrated production–storage obtained,...

Abstract Purpose To assess the efficacy of morphogeometric and volumetric characterization cornea based on three‐dimensional (3‐D) modelling in diagnosis subclinical keratoconus (KC). Methods Cross‐sectional study. Ninety‐three eyes with KC a best spectacle‐corrected distance visual acuity ≥20/20 (grade zero according to RETICS classification) 109 control were included. Computer‐based 3‐D corneal model was generated using raw topographic data. Distance‐, area‐ volume‐based parameters used...

Create a unique predictive model based on set of demographic, optical, and geometric variables with two objectives: classifying keratoconus (KC) in its first clinical manifestation stages establishing the probability having correctly classified each case.We selected 178 eyes subjects (115 males; 64.6%; 63 females, 35.4%). Of these, 74 were healthy control subjects, 104 suffered from KC according to RETICS grading system (61 early KC, 43 mild KC). Only one eye patient was selected, 27...

Purpose: To evaluate the postoperative behavior of central corneal stromal thickness after myopic femto–laser-assisted in-situ keratomileusis (LASIK) and small-incision lenticule extraction (SMILE) by using combined anterior segment optical coherence tomography a Placido disk topographer to compare accuracy both laser machines in predicting real change. Setting: Vissum Miranza, Alicante, Spain. Study design: Prospective, observational, comparative study. Methods: The VisuMax 500 kHz...

The accuracy and reliability requirements in aerospace manufacturing processes are some of the most demanding industry. One first steps is detection precise measurement using artificial vision models to accurately process part. However, these systems require complex adjustments do not work correctly uncontrolled scenarios, but manual supervision, which reduces autonomy automated machinery. To solve problems, this paper proposes a convolutional neural network for drills other fixation...

To evaluate the postoperative changes in corneal epithelium thickness and refractive power after femtosecond laser-assisted laser situ keratomileusis (LASIK) small incision lenticule extraction (SMILE) for myopia correction using anterior segment optical coherence tomography (OCT) with an integrated Placido disc topographer.The VisuMax 500-kHz (Carl Zeiss Meditec AG) Amaris 750 excimer (SCHWIND eye-tech-solutions) were used. Central, paracentral, 6-mm epithelial values obtained, change value...