title: The Corneal EyeSys System: accuracy analysis and reproducibility of first-generation prototype.
abstract: The EyeSyS Corneal Topography System manufactured by EyeSys Laboratories, Inc., Houston, Tex utilizes a unique data-acquisition design to perform rapid, cost-effective quantitative photokeratoscopy. We evaluated a first-generation prototype system. Repeated testing with this prototype demonstrated an accuracy and reproducibility to within 0.25 D on spherical surfaces. Similar results were obtained in testing aspherical surfaces without refocusing. Data from preliminary clinical studies are displayed for the following corneal conditions: normal, keratoconus, post-keratoplasty, and post-keratoplasty with wound ectasia. Advantages of the EyeSys System include rapid data analysis and display, ease of operation, and compact table-top size.
authors.affiliation: Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030.
authors.forename: D D
authors.initials: DD
authors.lastname: Koch
authors.forename: G N
authors.initials: GN
authors.lastname: Foulks
authors.forename: C T
authors.initials: CT
authors.lastname: Moran
authors.forename: J S
authors.initials: JS
authors.lastname: Wakil
mesh_terms: D000328:Adult; D002138:Calibration; D003196:Computer Graphics; D003315:Cornea / Q000033:anatomy & histology* / Q000473:pathology; D005069:Evaluation Studies as Topic; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D007640:Keratoconus / Q000473:pathology / Q000601:surgery; D015948:Keratoplasty, Penetrating; D008875:Middle Aged; D009885:Ophthalmology / Q000295:instrumentation*; D015203:Reproducibility of Results