What should never be used to irrigate the eye when a soft contact lens gets stuck?

Using water to irrigate the eye when a soft contact lens gets stuck is strongly inadvisable due to several critical reasons. Firstly, water can cause the lens to swell and change shape due to its different osmotic properties compared to saline or other ophthalmic solutions. This could make the lens even more difficult to remove and potentially cause damage to the eye itself, leading to irritation or infection.

Additionally, water lacks the necessary buffering agents and preservatives found in saline and ophthalmic solutions, which are specifically formulated for use in the eyes. These formulations help maintain a safe and compatible environment for the lenses and the ocular surface. Using plain water can disrupt the delicate balance of the tear film and lead to complications.

In contrast, saline solutions, ophthalmic solutions, and eye drops are designed for ocular use and can provide the necessary hydration and comfort without the risks associated with water. They help in safely lubricating the lens and the eye, ultimately facilitating easier removal of the stuck contact lens.