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Dissertation

The influence of scribe mark pattern on perceived rotation of toric soft contact lenses

1 May 2003

Abstract

This study examined the effect of toric lens scribe mark designs on the perceived angle of rotation. Forty seven novice observers viewed video of 10 presentations for each of the seven lens designs. Overall, observers underestimated angles of rotation and no single lens design was more accurately estimated than any other. When horizontal vs. vertical lens designs were compared, the horizontal lenses were underestimated less than the vertical. Gender did not influence axis estimations.


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