At the Ramada, I cared for a lady whose eyes were red and itchy. She had no allergies, and I saw no evidence of an infection. I suspected something was irritating them, and she had been using several over-the-counter eye-drops. Drops themselves can irritate eyes, especially with persistent use, so I told her to stop.
No eye drops for an eye problem?.... She looked uneasy at this suggestion, so I left a bottle of antibiotic drops but told her to call in two days if she still felt bad and wanted to use them. This is another occasion why so many patients prefer alternative medical practitioners (herbalists, nutritionists, acupuncturists…). It's rare that an alternative healer tells a patient: "There's no treatment for this; it'll go away." There's always a treatment.