Why use preservative-free eye drops?

Preservative-free eye drops are recommended for individuals who need frequent eye drops to manage conditions like dry eye. This is primarily because preservatives, while necessary in bottles to prevent bacterial growth after opening, can cause irritation or even inflammation to the ocular surface if used extensively. Preservative-free eye drops usually come in single-use containers that, once opened, should be used immediately and discarded at the end of the day to prevent contamination. These eye drops are especially useful for those who require multiple applications throughout the day, providing relief without the potential harmful effects of preservatives 1.