VERA research has revealed that except for visual acuity, most vision screening has limited correlation to reading grade level and/or curriculum-based assessments. By contrast, visual efficiency correlates well with academic standing and the results of functional vision examinations. As you know, this type of vision screening requires expertise, and is why school screening misses many vision issues which affect learning.
Additional research defined VERA's accuracy in identifying students with visual efficiency problems when compared to teams of vision and reading specialists assessing the same students. VERA's identification protocol is approximately 60% sensitive (the proportion of actual positives which are correctly identified) and 90% specific (the proportion of negatives which are correctly identified as such).
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Using VERA in a professional office
VERA's routine screening can be used as a pre‐examination screening for visual acuity, hyperopia and the presence of binocular vision for patients of any age. The visual efficiency screening can be given if the patient passes the routine screening or once their vision correction is in place. The entire screening can be run by an assistant and areas of potential weakness can then be confirmed during your examination. During or after the vision therapy evaluation, VERA can be used as a demonstration of need to patients and/or parents.
Even if your practice does not provide vision therapy services, screening for visual efficiency can enable an appropriate and appreciated referral with a minimum of time and effort.
NOTE: Because VERA's design is as an institutional screening, the program may differ from usual in-office testing as follows: The visual acuity screening has test lines which correspond to 20/20, 20/25, 20/30, 20/40, 20/70, 20/200 and 20/400. Other lines have been omitted to render an institution's vision screening more efficient without changing the pass/fail accuracy. Nonetheless, the program gives an accurate indication of whether or not your patient's visual acuity requires correction.
The routine binocular vision screening includes tests for suppression, stereopsis and phoria which are not scored individually. Passing the binocular screening requires passing any 2 of the three tests, indicating whether additional binocular testing is advised.