Last I heard, it will not cause you to go blind after all. But, there is a time and place for all things and if you become too obsessive, it can severely impact your social standing. At work is not a good place to jack off. You can never be absolutely certain if your behavior is going unnoticed and it does distract you from your responsibilities. Like most things, it should be practiced in moderation. As you mentioned, masturbating can become addictive. You start feeling the need for a quick fix because the endorphins that are released when doing it make you feel good. But, your body can become tolerant and the fixes become less effective. So, you become even more obsessed.
I suggest practicing a method that is often referred to as 'self restraint'. It means save it for when you are at home.