Purpose: A clinical trial was conducted to evaluate the activity of a new artificial tear containing hyaluronic acid (HA) and low-dose hydrocortisone to control dry-eye disease (DED) symptoms.
Methods: a randomized, controlled, double-masked study was carried out at the Ocular Surface and Dry Eye Center, "Luigi Sacco" University Hospital (Milan, Italy), between June 2020 and June 2021. The study involved patients with DED for at least 6 months. After an initial 7-day treatment with corticosteroid, the treatment with the new artificial tear (four-times a day for 6 months) was compared with a control HA solution.
Results: A total of 40 patients were considered. We observed a significant improvement in the frequency and intensity of DED symptoms in both groups. After corticosteroid discontinuation, the maintenance of the therapeutic advantage was observed only in the treatment group, which also showed a significant improvement of the tear film break-up time (p ≤ 0.05) and infiltrated macrophages (p < 0.05). A significant reduction in fluorescein and Lissamine staining (p < 0.05) was observed in the treatment group, suggesting damage reduction at both corneal and conjunctival levels. Intraocular pressure did not change at the end of the treatment period and was maintained within the normal range, sustaining the product's safety.
Conclusions: Our findings support the prolonged use of the new eye drop with low-dose hydrocortisone, also in the DED initial stages, to prevent the degenerating towards a chronic condition (http://www.isrctn.com/ISRCTN16288419).
Keywords: Dry eye disease; hyaluronic acid; hydrocortisone; ocular surface disease; para-inflammation.