Abstract
The validity of use of two artist-rendered and two photographic sets of grading scales (grading 'systems') designed for gauging the severity of contact lens-related ocular pathology was assessed in terms of precision and reliability. Thirteen observers each graded 30 images - by interpolation or extrapolation to the nearest 0.1 increment - of each of the three contact lens complications (corneal staining, conjunctival redness and papillary conjunctivitis) that were common to all four grading systems. This entire procedure was repeated approximately two weeks later, yielding a total data base comprising of 9360 individual grading estimates. Analysis of variance revealed statistically significant differences in both precision and reliability between systems, observers and conditions (p
| Original language | English |
|---|---|
| Pages (from-to) | 17-29 |
| Number of pages | 12 |
| Journal | Ophthalmic and Physiological Optics |
| Volume | 21 |
| Issue number | 1 |
| Publication status | Published - 2001 |