Distilled water can be used to wash your eyes occasionally, but you should not wash your eyes with distilled water on a regular basis.
Distilled water compared with tap water, water cleanliness is higher, less colony content, with distilled water to wash the eyes, less harmful to the eyes.
Although distilled water is pure water, but does not mean that distilled water is completely sterile, distilled water in the collection, storage process is prone to secondary contamination, distilled water still contains bacteria, they will lead to eye diseases; distilled water will also change the PH value and osmotic pressure in the tears, bringing eye edema, dry eyes and other uncomfortable symptoms.
Therefore, you can occasionally use distilled water to wash your eyes, but do not recommend long-term, frequent use of distilled water to wash your eyes, it is recommended to wash your eyes with saline is better, eye discomfort symptoms in a timely manner to seek medical attention.