Effects of WC on Tear Film, Blink Pattern and Meibomian Glan
A Study was conducted to assess the effects of warm compress (WC) on tear film lipid layer, blink pattern and Meibomian gland function in patients with dry eye following femtosecond laser small incision lenticule extraction (SMILE) and laser-assisted subepithelial keratomileusis (LASEK).

37 eyes of 37 participants were enrolled. WC was performed using a spontaneously heating eye mask. Tear film break-up time (TBUT), tear film lipid layer thickness (TFLLT), blink pattern, Meibomian secretory function scores (MGS), visual acuity, spherical equivalent (SE), keratometry, central corneal thickness (CCT) and aberration were assessed before and after WC.

Results:
After WC, the following mean values all increased relative to baselines: CCT, SE, minimum, maximum and average TFLLT, TBUT, total MGS (TMGS), number of glands secreting any liquid (MGL), and complete blink rate (CBR).

--Partial blink frequency (PBF) and partial blink rate (PBR) decreased.

--The decrease of PBF was higher in SMILE subgroup than in LASEK.

--TBUT variation was positively correlated with that of Ave-TFLLT and TMGS.

--Max-TFLLT variation was correlated with that of TMGS.

Conclusively, after corneal refractive surgery, WC may temporarily increase tear film thickness and stability, decrease partial blinking, and somewhat augment Meibomian gland function in dry eye patients.

Source: https://bmcophthalmol.biomedcentral.com/articles/10.1186/s12886-021-02091-2
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