No, salt would probably not be an effective method. If you're going for the hydrophilic method like that, you're better off using honey, which was used at several different spots throughout history as a wound dressing.
While we can do much better nowadays, it does have some anti-microbial properties and could definitely be better than nothing.
If all you have is salt, you could try making a saturated saltwater solution and using that, but it's not going to be as effective. These are not particularly good methods in general, as there are many, many pathogens that can resist them in a wide variety of ways. (like, viruses not necessarily needing water to still exist, for instance)
I would describe it as a cacaphonic symphony that you eventually get used to. It packs as much information into one sense as you can get from your other four put together.
Much like how you can discern an individual instrument type in a symphony, sight lets you discern individual objects from afar, and gives you a mostly accurate summary of its basic properties.
Also much like with sound, it can be very appealing or unappealing, depending. There's an intrinsic beauty to the sense itself though. Every object has color, for instance, and color is more like smell. It can give you hints about what something is, but its mostly an arbitrary blend of different "flavors" that combine to create more complex examples.
It's the super-sense, the one sense that binds them all. When one of your other four detects something, your first instinct is to locate it with sight to determine more information before you do anything else. You "look at it" first. Almost without fail.