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Criteria for decompensation in binocular vision.
T C Jenkins1, L D Pickwell, A A Yekta
1University of Bradford, West Yorkshire, UK.
Summary
Heterophoria measurement is not a reliable routine diagnostic tool for near vision symptoms. Associated heterophoria may indicate symptoms, particularly in younger patients with higher prism dioptre values.
Area of Science:
- Ophthalmology
- Optometry
- Vision Science
Background:
- Near vision symptoms can be challenging to diagnose in routine investigations.
- Heterophoria, an eye alignment issue, is often considered in relation to visual discomfort.
Purpose of the Study:
- To determine if heterophoria measurements can predict near vision symptoms.
- To identify cut-off values for dissociated and associated heterophoria that discriminate between symptomatic and asymptomatic patients.
Main Methods:
- Patients were divided into age groups (under 40, 40 and over) and by near vision symptoms.
- Signal detection theory and Receiver Operator Characteristic (ROC) curves were employed.
- Dissociated and associated heterophoria values were analyzed.
Main Results:
- No dissociated heterophoria value could reliably distinguish between symptomatic and asymptomatic patients.
- For associated heterophoria, values of 1 prism dioptre or more were linked to symptoms in patients under 40.
- In patients 40 and over, 2 prism dioptres or more of associated heterophoria indicated a higher likelihood of symptoms.
Conclusions:
- Routine heterophoria measurement is not recommended for diagnosing near vision symptoms.
- Associated heterophoria shows potential as an indicator, with specific prism dioptre thresholds varying by age group.