Barr, J T <br/><br/>
Corneal scarring in the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study: baseline prevalence and repeatability of detection.  [electronic resource] 

 -  Cornea  Jan 1999 
 - 34-46 p.  digital 
<br/><br/> Publication Type: Clinical Trial; Comparative Study; Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0277-3740 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cicatrix--diagnosis<br/>Cornea--pathology<br/>Diagnostic Techniques, Ophthalmological<br/>Disease Progression<br/>Evaluation Studies as Topic<br/>Follow-Up Studies<br/>Humans<br/>Keratoconus--diagnosis<br/>Observer Variation<br/>Photography<br/>Prevalence<br/>Prospective Studies<br/>Reproducibility of Results<br/>United States--epidemiology