Andrasko Comfort Analysis                                       Print this page

The main purpose of the Lens/Solution biocompatibility study was to determine which lens/solution combinations successfully interact without causing excessive corneal staining. These results are shown on the main Staining Grid page of this web site.

A second goal of this study was to determine if a relationship exists between corneal staining and lens wearing comfort. Subjects were instructed to rate the subjective comfort of the lens/solution combination at 10 minutes, 2 hours, and 4 hours after lens insertion using a 100-point comfort scale. This figure shows the average Staining Area (%) versus the average Comfort Rating of each lens/solution combination tested to this point. Saline (control) results are excluded.

The trend line shows average comfort ratings vs. average staining area at 2 hours after lens insertion. The general downward slope of each line indicates that comfort tends to decrease as staining increases.