I too hadn’t heard of several brand you mentioned. My eye dr started me on Naphcon before graves was diagnosed thinking I had alergies to my cat…NOpe, but they do feel nice in my eyes. I can’t use anything very thick as I’m on the computer all day for work, and have to be ready to key any time my phone rings, so I try to stay away from the thick ones. It’s hard just quick dripping in drops and getting glasses back on before my phone rings again. And I do realize no preservatives etc that you mentioned. The new visine out is for dr eyes and is very comforting too. I’ll check my drug store for some of the brands you mentioned.