Like any other product, the binoculars succumb to wear and tear along with their ageing. You could certainly try your hands on while repairing a few usual glitches and damage. Also, if you have a newer pair that is under warranty, then you can get it repaired from the brand itself. Again, you can fix pretty much every problem, from collimation to even modifying some binoculars to focus closer. You can also service them regularly to increase their lifespan. This process involves stripping down the entire binocular ad cleaning it inside out.