Grading contact lens complications under time constraints
PURPOSE: To investigate the effect of observation time on the precision of grading the severity of contact lens complications. METHODS: Twenty-five optometry students used the Efron Grading Scales for Contact Lens Complications to grade the severity of one image of each of the 16 forms of anterior eye pathology depicted in the Efron scales. This procedure was repeated for observation times of 0.1, 2, and 60 s. RESULTS: Overall, significantly greater grading precision (smaller standard deviation of mean grades) was demonstrated for longer observation times (p < 0.004); however, certain complications appear to require longer observation times for precise grading. There was a highly significant dependence of the mean grade on image (p < 0.0001), observation time (p < 0.0001), and observation time-image interaction (p < 0.0001). CONCLUSIONS: Overall, a brief viewing time of a few seconds is typically all that is required for precise grading of ocular complications of contact lens wear. Some forms of pathology are more complex and may require more time to grade precisely.
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|Item Type:||Journal Article|
|Additional Information:||The contents of this journal can be freely accessed online via the journal’s web page (see hypertext link) 12 months after publication.|
|Keywords:||contact lens complications, grading scales, precision, time constraints, OAVJ|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)|
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
|Divisions:||Current > Research Centres > Centre for Health Research|
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 2007 Lippincott Williams & Wilkins|
|Deposited On:||21 Jan 2008|
|Last Modified:||29 Feb 2012 23:37|
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