Institutional members access full text with Ovid®

Pilot Study of Contact Lens Practitioner Risk-Taking Propensity

Carnt, Nicole*; Keay, Lisa; Willcox, Mark D. P.; Evans, Vicki; Stapleton, Fiona

doi: 10.1097/OPX.0b013e31821ddd9c
Original Article

Purpose. To determine risk-taking propensity of optometrists and the association with the volume of contact lens practice and prescribing profile. Other factors associated with high practitioner risk taking and larger volume contact lens practices were also investigated.

Methods. Sixty-four practitioners were recruited through Australian professional associations. Practitioners completed a risk-taking propensity survey and rated the importance of risk factors for contact lens-related microbial keratitis on prescribing decisions and wearer advice (prescribing profile). Demographics and the number of contact lens wearers seen per week were documented. Risk-taking propensity was estimated after adjusting for item difficulty using Rasch analysis, then scaled 0 to 100. Prescribing profile, practice type, practitioner age, and gender were tested for association with risk-taking propensity. Risk-taking propensity, practitioner age, personal contact lens wear, and the socioeconomic status of the practice location were investigated for association with the volume of contact lens patients with regression.

Results. Rasch analysis of the risk-taking questionnaire indicated good person separation and reliability (2.44, 0.86) but some item redundancy (1.69, 0.74). Risk taking (mean 35, range 0 to 71) was associated with increasing number of contact lens patients (p = 0.02). The perceived importance of risk factors (p = 0.9) and likelihood of discussing them with patients (p = 0.7) were not associated with risk-taking propensity. Risk taking (p = 0.02) and socioeconomic status of the practice location (p = 0.03) were predictors of higher volume contact lens practices.

Conclusions. Practitioners who see a higher volume of contact lens patients tend to have higher risk-taking personalities. However, increased risk taking did not affect the perceived importance and type of advice given to contact lens wearers. Higher socioeconomic status of the practice location is also associated with larger volume of contact lens patients. This information gives insight into what drives higher volume contact lens practice within Australia and may have applications to the contact lens and wider optical industry.

*BOptom, FAAO



Brien Holden Vision Institute, Sydney, New South Wales, Australia (NC, MDPW, FS), School of Optometry and Vision Science, University of New South Wales, New South Wales, Australia (NC, LK, MDPW, VE, FS), and The George Institute for Global Health, University of Sydney, New South Wales, Australia (LK).

Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (

This work was supported by the Brien Holden Vision Institute and the British Contact Lens Association Dallos Award 2010.

Received November 30, 2010; accepted March 21, 2011.

Nicole Carnt, Brien Holden Vision Institute, Level 3, Rupert Myers Building, North Wing, Gate 14, Barker Street, University of New South Wales, Sydney, New South Wales 2052, Australia, e-mail:

© 2011 American Academy of Optometry