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Hook and loop fastener on loose prisms assists in measuring ocular deviation
I F Wessels1, S Thomas, D A Wessels
1University of Tennessee College of Medicine, Chattanooga, USA.
Ophthalmic Surgery and Lasers
|October 7, 1998
Summary
A new Velcro system simplifies holding loose prisms for strabismus evaluation. This method accurately assesses ocular deviations, improving clinical convenience for strabismus surgery patients.
Area of Science:
- Ophthalmology
- Surgical Technology
Background:
- Handling loose prisms for ocular deviation assessment can be inaccurate, especially with large-angle exotropia or vertical deviations.
- Existing methods for prism manipulation may lack stability and ease of use during clinical evaluations.
Purpose of the Study:
- To introduce and evaluate a novel, simple system for securely holding loose prisms during the clinical assessment of ocular deviations.
- To determine the accuracy and practicality of this Velcro-based prism holder in patients undergoing strabismus surgery.
Main Methods:
- A Velcro-based system was developed by attaching hooked Velcro strips to prisms and looped Velcro to a wooden bar.
- This system allows prisms to be suspended and held easily in one hand, facilitating horizontal and/or vertical adjustments.
- A retrospective study of 40 consecutive strabismus surgery patients (without adjustable sutures) evaluated the accuracy of this method.
Main Results:
- The system demonstrated ease of use and convenience in clinical practice.
- In patients with exotropia, esotropia, abducens paralysis, and trochlear palsies, the method facilitated accurate prism use.
- Post-surgical residual deviation was less than 10 D in all but 2 patients (5.9%), indicating high accuracy.
Conclusions:
- The developed Velcro prism holder is a simple, inexpensive, and effective tool for clinical evaluation of ocular deviations.
- This system enhances the accuracy and convenience of prism manipulation, aiding in precise strabismus assessment and surgical planning.