Vismed Gel, through its higher concentration of sodium hyaluronate (0.3%, which is almost twice the amount of Vismed), is the solution to achieve longer-lasting relief of persistent symptoms in the eye.nTests have shown that solutions with higher concentrations of sodium hyaluronate stay on the eye for longer, and will therefore increase the thickness and stability of the tear film. Vismed Gel also contains essential ions and supplies the tissue with moisture.nDue to its high concentration Vismed Gel feels silky on the eye and needs to be applied less frequently.