5. Dryness due to tear absence
The absence of tears can present a major problem for certain individuals. Surgeries and other procedures are options to try to fix the problem, as well as medical grade eye drops (a simpler solution to surgery).
Make sure to do your research as to what your options are for solutions to this issue, and be relieved that this is not contagious so it will not affect your ability to be around others. It is not uncommon so do not feel bad or unusual if this applies to you. Simply look into your options if it is causing disturbance for you.