Celluvisc eye drops/Dry eyes syndrome?

Cel-U-Visc is preservative free unless there is some version of it that is available in the UK that is not here. Again based on products that are available in the US, if it comes in unit dose containers, it is preservative free. Most people would have issues using Cel-U-Visc during the day because it is so thick. It may gunk up your contacts a bit. This is less of an issue because you are wearing dailies. There are also products designed specifically for use with contacts although none of them will be as thick as Cel-U-Visc. In general when it comes to lubricant drops, the thicker it is, the longer it stays around. The thicker it is, the more it messes up your vision.