Welch Allyn RETeval-DR, Directions For Use Manual

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Test results
The DR Assessment Protocol combines implicit time, amplitude, age, and pupil
response. The protocol creates a unified result score, which is shown immediately after
test completion. Patients with more-severe levels of diabetic retinopathy will typically
have a higher test result (Maa et al. 2016).
The DR Assessment Protocol will classify the test result as either High, Normal, or Low
depending upon the reference interval selected. The default reference interval is set at
7.0-19.9; This reference interval can be adjusted; refer to “Adjust reference interval” for
more information.
DR assessment protocol result scoring
1
Result High Normal Low
≥
20.0 19.9 – 7.0
≤
6.9
1. Default reference interval
High test results—greater than or equal to 20.0 using the default reference interval—are
indicative of more-severe levels of diabetic retinopathy, as shown below.
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