Evaluation of the Efficacy and Safety of A Novel 0.05% Cyclosporin A Topical Nanoemulsion in Primary Sjögren's Syndrome Dry Eye.

: To evaluate the efficacy and safety of a novel topical cyclosporin A 0.05% nanoemulsion in comparison with a conventional emulsion in primary Sjögren's syndrome dry eyes.: Prospective, randomized, double-blinded study was conducted.: Corneal and conjunctival staining score was improved in both groups, with a faster change noted in the nanoemulsion group at 12 weeks (p < 0.05). Tear film break-up time was significantly improved in the nanoemulsion group at 12 weeks (p < 0.05), while ocular surface disease index score was improved in both groups without a difference at 12 weeks. Schirmer I value and goblet cell grade did not change in both groups. IL-6 and MMP-9 were significantly decreased in both groups at 12 weeks.: Both nanoemulsion and conventional cyclosporin A improved ocular signs, symptoms, and conjunctival inflammation. However, the novel cyclosporin A nanoemulsion showed faster improvement of ocular surface staining scores than the conventional emulsion.