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Suppression of the optokinetic nystagmus when a target is perceived can be applied to assess visual acuity objectively. Our aim is to establish prediction intervals for this optokinetic nystagmus suppression test (Speedwheel Test, SW) so that SW acuity may be used to estimate Snellen acuity (FrACT- C and -E) in the clinic in adults and children unable to cooperate in other acuity testing.
In this prospective single center study subjects aged at least 4 years underwent testing of visual acuity with SW, Landolt-C and Tumbling-E symbols (Freiburg acuity test: FrACT-C, FrACT-E). Prediction intervals are to be established for SW compared to FrACT-C or -E and for FrACT- E compared to FrACT-C.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Human subjects aged 4 and above | Human volunteers aged 4 and above. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Visual acuity testing with SW , Landolt-"C" and Tumbling-"E" symbols | Diagnostic Test | Establish prediction intervals for acuity tests |
|
| Measure | Description | Time Frame |
|---|---|---|
| Prediction intervals of Snellen acuity for the SW | Prediction intervals of Snellen acuity for the SW compared to Landolt C and E symbols | 12 months |
| Measure | Description | Time Frame |
|---|---|---|
| Prediction intervals of Snellen acuity for Landolt C compared to E symbols | Prediction intervals of Snellen acuity for Landolt C compared to E symbols | 12 months |
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Inclusion Criteria:
Exclusion Criteria:
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healthy volunteers aged 4 and above
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| Name | Affiliation | Role |
|---|---|---|
| Anja M Palmowski-Wolfe, Prof | University Basel, University Eye Hospital Basel | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University Basel, University Eye Hospital Basel | Basel | 4031 | Switzerland |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 31526857 | Background | Schwob N, Palmowski-Wolfe A. Objective measurement of visual acuity by optokinetic nystagmus suppression in children and adult patients. J AAPOS. 2019 Oct;23(5):272.e1-272.e6. doi: 10.1016/j.jaapos.2019.05.016. Epub 2019 Sep 14. | |
| 32330979 | Background | Schwob N, Palmowski-Wolfe A. Establishing an Objective Measurement of Visual Acuity with a Computerised Optokinetic Nystagmus Suppression Test. Klin Monbl Augenheilkd. 2020 Apr;237(4):502-505. doi: 10.1055/a-1119-6123. Epub 2020 Apr 24. |
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The results are to be shared in a publication
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| 33853189 | Result | Luethy ML, Schotzau A, Palmowski-Wolfe A. Establishing Prediction Intervals for the SpeedWheel Acuity Test in Adults and Children. Klin Monbl Augenheilkd. 2021 Apr;238(4):488-492. doi: 10.1055/a-1403-2218. Epub 2021 Apr 14. |