The Effect of Autologous Serum Tears Diluted to 50% With 0.2% Sodium Hyaluronate-Containing Preservative-Free Artificial Tears Versus Autologous Serum Tears Diluted to 50% With Balanced Salt Solution in Patients With Moderate-to-Severe Dry Eye Disease: A Prospective, Double-Blind, Randomized, Controlled, Contralateral-Eye Study | Arctuva