OBJECTIVES: To describe the indications for and visual outcomes of intrastromal corneal ring segment implantation. METHODS: A large retrospective case-series chart-review study was conducted using Sorocaba Ophthalmological Hospital medical records. This study included 1222 eyes (1196 patients) that were surgically treated between November 2009 and December 2012. The following preoperative dat...

AUGUST 2011 CATARACT & REFRACTIVE SURGERY TODAY 31 P rogressive, asymmetrical corneal steepening associated with an increase in myopic and astigmatic refractive errors, combined with midperipheral and/or peripheral corneal thinning, represents a constellation of findings in ectatic corneal disorders (eg, keratoconus and pellucid marginal degeneration). These entitites are associated with asymme...

PURPOSE Four videokeratographic methods for keratoconus detection were compared with a neural network approach. METHODS A classification neural network for keratoconus screening was designed to detect the presence of keratoconus (KC) or keratoconus suspects (KCS); a separate cone severity network graded the severity of conelike topography patterns consistent with KC or KCS. Three hundred TMS-...

PURPOSE To evaluate and compare visual, refractive, and corneal aberrometric outcomes after implantation of 2 types of intrastromal corneal ring segments (ICRS) in eyes with early to moderate ectatic disease. SETTINGS Vissum Corporation-Instituto Oftalmológico de Alicante, Alicante, Spain. METHODS This retrospective analysis comprised consecutive eyes with grade I or grade II corneal ectasi...

In this paper, the view into the ontology-based experience management in the Pellucid project is presented. The result of the project – the Pellucid platform works in cooperation with a underlying system, that reports workflow events for employees in public organizations. Experiences produced by employees are captured, stored and re-used as useful help for novice or other employees in public or...

Public organisations often face knowledge problems due to the continual and pervasive movement of staff between units and department. The Pellucid project is developing a knowledge management system to assist in such situations. This paper describes the knowledge engineering and the knowledge level modelling undertaken in Pellucid. We use CommonKADS task templates as a mechanism to identify and...