Practical Approaches to Prism Prescribing

Real-world case examples illustrated strategies for horizontal and vertical prism prescribing.

Jennifer Ford, content director

Optometric Management October 9, 2025 Vol 60 (8), Issue October 2025

Clinical Report: Practical Approaches to Prism Prescribing

Overview

This report summarizes insights from the presentation 'Rapid Fire: Pearls of Prism Prescribing' at the 2025 American Academy of Optometry Annual Meeting, focusing on specific strategies for prism prescribing.

Background

Prism prescribing is critical for managing binocular vision disorders, significantly impacting patients' quality of life. Understanding the strengths and limitations of various methods, along with real-world case examples, enhances the practical application of prism therapy.

Data Highlights

No numerical data was provided in the source material, indicating a qualitative rather than quantitative analysis.

Key Findings

Classic prescribing rules, such as those by Sheard and Saladin, have strengths and limitations. Trial framing and patient response are crucial in determining the final prism prescription. Base-in prism can improve fusion and comfort in patients with convergence insufficiency, although evidence shows limited objective benefit in children. Vertical deviations linked to trochlear nerve palsy require nuanced management strategies. Fresnel prisms are useful for trialing and temporary treatment despite reduced acuity and contrast sensitivity. Yoked prisms can improve balance and reduce postural instability in traumatic brain injury patients.

Clinical Implications

Optometrists should employ a structured, evidence-based approach to prism prescribing, starting with simple tests and refining based on patient feedback. Continuous monitoring of outcomes is essential for effective management.

Conclusion

Effective prism prescribing requires a blend of clinical knowledge and practical application. By utilizing structured methods and patient-centered approaches, optometrists can enhance treatment outcomes for patients with binocular vision disorders, while remaining adaptable to new evidence and techniques.

PentaVision

Optometric Management