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Normative Values for Near and Distance Clinical Tests of Stereoacuity.
Marianne E F Piano1, Laurence P Tidbury2,3, Anna R O'Connor3
1a Institute of Applied Health Research, Glasgow Caledonian University , Glasgow , United Kingdom.
This study establishes normative stereoacuity values for adults using five common stereotests. Findings highlight the importance of understanding test-specific upper limits for accurate clinical assessment.
Area of Science:
- Ophthalmology
- Vision Science
- Optometry
Background:
- Limited normative stereoacuity data exists for older children and adults.
- Individual stereotests have varying upper limits of normality, making them non-interchangeable.
Purpose of the Study:
- To determine normative stereoacuity values for five near and distance stereotests in adults aged 16-40.
- To provide essential data for accurate clinical interpretation of stereotests.
Main Methods:
- A large sample of 206 participants (mean age 22.18±5.31 years) across three studies were tested.
- Five stereotests were administered: TNO, Preschool Randot (PSR), Frisby, Distance Randot, and Frisby-Davis 2.
- Medians and upper limits of normality were calculated for each stereotest.
Main Results:
- Upper limits of normality varied significantly by test: TNO (120" arc), PSR (70" arc), Frisby (40" arc), Distance Randot (160" arc), and Frisby-Davis 2 (25" arc).
Conclusions:
- Normative stereoacuity values for adults were identified for five stereotests.
- The study discusses variations between tests and testing distances, emphasizing the need for test-specific interpretation.
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