Regarind to your question, if you just run out of your contact lens solution, you can make saline solution at home naturally. Saline solution is something we purchase regularly in our house. Not limited to eye and contact lens care, saline solution can also be used for wound irrigation and as a nasal rinse. The saline solution consists of two very basic components, salt and water. Saline solution is easy to make at home. You will need:
clean glass bottle or jar with lid, table salt, pot with lid.
Put one cup of water and 1/2 teaspoon of salt into the pot. Put the lid on.
Boil for 15 minutes with the lid on (set a timer).
Set the pan aside until cooled to a room temperature.
Carefully pour the salt and water (normal saline) from the pan into the jar or bottle and put the lid on.