Date of Award

5-2003

Degree Type

Dissertation

Degree Name

Master of Science in Vision Science

Committee Chair

Peter Bergenske

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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Optometry Commons

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