6. (foll by: to) related (to) or dependent (on). 7. (when: postpositive, often foll by to) having a subsidiary or minor relationship (with). 8. (General Physics) (esp of a beam of light or particles) arriving at or striking a surface: incident electrons.
Answers (1) hill. Personally, if you use salt water properly, it won't cause any damages to your sunglasses. But if you rinse your sunglasses in salt water for a long time, it may cause some damages to the lens coating of your sunglasses. Anyway, you needn't rinse your sunglasses in salt water.
The cost of the frames can also add to the value. It is important to care for glasses and clean them correctly when they get saline water spots on them. Besides being annoying, saline spots can cause damage to the eye glass lenses and frames. Regardless of how salt water spots end up on eye glasses, the result of the accidental spill can dry into a crusty white residue. This is actually salt crystals forming.