Visual Acuity
Conditions
Brief summary
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.
Detailed description
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.
Interventions
DIAGNOSTIC_TESTVisual acuity testing with SW , Landolt-C and Tumbling-E symbols
Establish prediction intervals for acuity tests
Sponsors
University of Basel
Study design
Observational model
COHORT
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
4 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* able and willing to perform the test
Exclusion criteria
* under 4 years of age * unable or unwilling
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Prediction intervals of Snellen acuity for the SW | 12 months | Prediction intervals of Snellen acuity for the SW compared to Landolt C and E symbols |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Prediction intervals of Snellen acuity for Landolt C compared to E symbols | 12 months | Prediction intervals of Snellen acuity for Landolt C compared to E symbols |
Countries
Switzerland
Outcome results
None listed