Blink Test enhances ability to screen for dry eye disease

Area of Science:

• Ophthalmology
• Diagnostic Tools
• Dry Eye Disease

Background:

• Dry eye disease (DED) affects a significant portion of the population, impacting ocular comfort and vision.
• Accurate and accessible diagnostic methods are crucial for timely management of DED.

Purpose of the Study:

• To evaluate the patient-administered Optrex™ Dry Eye Blink Test for diagnosing DED.
• To assess the Blink Test's effectiveness in enhancing DED screening.

Main Methods:

• Eighty-seven participants were screened using the Tear Film and Ocular Surface Society Dry Eye Workshop II (TFOS DEWS II) criteria.
• The Blink Test was compared against established DED diagnostic markers, including Ocular Surface Disease Index, non-invasive tear breakup time (NIBUT), osmolarity, and ocular surface staining.

Main Results:

• The Blink Test, using a 10-second cutoff, achieved 66% sensitivity and 88% specificity for DED diagnosis (AUC=0.77).
• A correlation of r=0.47 was found between the Blink Test and NIBUT (p<0.001).
• Combining the Blink Test with a screening questionnaire improved sensitivity to 71% and specificity to 90%.

Conclusions:

• The Blink Test provides a rapid, patient-administered method for identifying potential DED.
• This test can be valuable for healthcare professionals lacking advanced instrumentation and for patient self-screening.