Tear film break-up patterns in thyroid eye disease

Area of Science:

• Ophthalmology
• Dry Eye Disease Research
• Thyroid Eye Disease (TED)

Background:

• Tear film break-up pattern (TFBUP) evaluation is crucial for diagnosing and managing dry eye disease.
• Thyroid eye disease (TED) frequently causes dry eye symptoms, necessitating specific diagnostic approaches.
• Understanding TFBUP variations in TED is essential for effective tear film-oriented therapy (TFOT).

Purpose of the Study:

• To investigate the characteristics of TFBUPs in patients diagnosed with dry eye secondary to TED.
• To compare the prevalence of different TFBUP classifications (area, line, spot, dimple, random) in TED patients.
• To correlate specific TFBUPs with clinical signs of TED and ocular surface damage.

Main Methods:

• A prospective, observational study involving 78 patients (154 eyes) with TED and dry eye criteria in Japan.
• Classification of TFBUPs into area, line, spot, dimple, and random break types.
• Statistical comparison of TFBUPs with the presence of TED-related signs (e.g., lid lag, Graefe sign) and superior limbic keratoconjunctivitis (SLK).

Main Results:

• Line breaks were the most frequent TFBUP in TED patients (51.9%), unlike in simple dry eye.
• Random breaks were significantly associated with a higher incidence of lid lag/Graefe sign and SLK (P < 0.050).
• Unlike in simple dry eye, random breaks in TED patients indicated a higher likelihood of concomitant SLK and ocular surface damage.

Conclusions:

• TFBUP analysis reveals distinct patterns in TED-related dry eye, with a higher prevalence of line breaks.
• The association of random breaks with SLK in TED suggests a specific etiological link and potential for more severe ocular surface compromise.
• These findings aid in understanding TED's impact on the ocular surface and refining TFOT strategies for these patients.