A computerized red glass test for quantifying diplopia.

Area of Science:

• Ophthalmology
• Neuro-ophthalmology
• Clinical Measurement

Background:

• Evaluating diplopia during bedside physical examinations presents challenges.
• Existing methods for diplopia assessment can be time-consuming or require specialized equipment.
• A need exists for a simple, quantitative bedside test for diplopia.

Purpose of the Study:

• To develop and validate a novel computerized red glass test (CRT) for diplopia.
• To assess the utility and feasibility of the CRT in a clinical setting.
• To compare CRT measurements with established methods like the Hess chart.

Main Methods:

• The CRT involves a white dot appearing on a monitor with red filter glasses over the right eye.
• Patients report perceived diplopia as seeing a white dot and a red dot.
• The degree of diplopia was measured as the distance between perceived dots and compared to Hess scores.

Main Results:

• The CRT demonstrated excellent test-retest reliability (ICC = 0.948).
• CRT measurements of diplopia correlated well with Hess scores (r=0.719, p=0.005) and Hess area ratios (r=-0.620, p=0.018).
• The study included 14 patients diagnosed with binocular diplopia.

Conclusions:

• The computerized red glass test (CRT) effectively detects and quantifies diplopia.
• The CRT is a useful and feasible tool for enhancing routine bedside ophthalmological examinations.
• This method offers a quantitative approach to diplopia assessment in clinical practice.