A Survey of Dilation Practices of Michigan Optometrists

Background: Optometrists were not always permitted to dilate patients, but it is now
considered an important part of a comprehensive ocular examination. This study looks at
dilation practices of optometrists currently licensed and practicing in Michigan. This
study may help establish clinical guidelines for practicing optometrists and new
graduates. Methods: A short survey was developed to collect data regarding
demographics and dilation practices of Michigan optometrists. The survey was hosted by
surveymonkey.com and distributed through the Facebook group "ODs on Facebook".
When responding, participants were asked to answer with regards to a 30-50 year old,
asymptomatic, generally healthy patient. Results: 76 surveys were analyzed for gender,
age, year of graduation, optometry school attended, and mode of practice. Chi Square
test of independence was run for all of the above categories in relation to frequency of
dilation. The results of Chi Square testing showed the following p-values: gender -
p=0.40, age - p=0.17, year of graduation - p=0.0001, optometry school attended -
p=0.58, mode of practice - p=0.02. Year of graduation and mode of practice were found
to be statistically significant while gender, age, and school attended were not.
Conclusions: While gender, age, and optometry school attended were not statistically
significant, this can be seen as a positive for the profession as there is no influence on the frequency of dilation based on gender, age, or optometry school attended. Also, 76% of participants dilated at least every 2 years, which aligns with American Optometric
Association Clinical Guidelines.