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Using an Automated Hirschberg Test App to Evaluate Ocular Alignment
Published on: March 24, 2020
Simple technique to measure toric intraocular lens alignment and stability using a smartphone
Joshua C Teichman1, Kashif Baig1, Iqbal Ike K Ahmed1
1From the Department of Ophthalmology (Teichman, Baig), University of Ottawa, Ottawa, Ontario, the Department of Ophthalmology and Vision Sciences (Ahmed), University of Toronto, Toronto, Trillium Health Partners (Ahmed), and Credit Valley EyeCare (Ahmed), Mississauga, Ontario, Canada.
This study introduces a simple, affordable method using a smartphone and software to accurately measure the axis of toric intraocular lenses (IOLs) after cataract surgery, aiding in astigmatism correction assessment.
Area of Science:
- Ophthalmology
- Medical Devices
- Optical Engineering
Background:
- Toric intraocular lenses (IOLs) correct corneal astigmatism during cataract surgery.
- Accurate IOL axis measurement is crucial for effective astigmatism correction.
- Assessing toric IOL alignment stability is important for patient outcomes and research.
Purpose of the Study:
- To present a novel, cost-effective, and precise method for measuring the toric IOL axis.
- To validate the use of smartphone technology for postoperative IOL assessment.
Main Methods:
- Utilized an iPhone 5S camera for image acquisition.
- Employed ImageJ software for toric IOL axis measurement.
- Developed a simple and inexpensive technique for clinical application.
Main Results:
- The described method provides a precise measurement of the toric IOL axis.
- The technique is simple to implement in a clinical setting.
- Smartphone-based measurement offers a viable alternative for IOL assessment.
Conclusions:
- A smartphone and ImageJ software offer a practical solution for toric IOL axis measurement.
- This method can enhance the evaluation of astigmatism correction after cataract surgery.
- The technique supports longitudinal assessment of toric IOL alignment stability.
