Using drops on a daily basis is a common practice in the general population. There are a variety of over the counter drops.
1) Redness relieving drops have vasoconstrictive agents. Redness relieving drops, such as Visine or Murine, can be safely used once or twice a day. However, it is best to reserve redness relieving drops for only occasional use - less than once a day. Lumify is a new redness relieving drop by Bausch & Lomb that is effective for up to 8 hours after use.
2) Lubrication drops are for adding moisture to the surface of the eye. There are lubricating drops and lubricating gels. Either drops or gels are good to use during the day to relieve symptoms such as burning, grittiness, redness, blurred vision, and itching. Lubrication drops are safe to use as needed - even multiple times per day. If one is using lubrication drops as much as 4 times per day, a prescription drop for dry eyes might be warranted.
3) Antihistamine drops help relieve itching. Over the counter antihistamine drops are safe to use on a daily basis for extended periods of time to alleviate itching, redness and tearing secondary to allergies.
As you can see, there are different categories of over the counter drops that are safe to use daily.
Dr. A. E. Bishop
Here's to comfortable eyes!