Guava leaves for red or tired eyes: what you should know
You may see claims that guava-leaf water or tea can be used as an eye wash for redness, tiredness, or irritation. However, there isn’t good clinical evidence that guava leaves safely treat these eye problems.
I would not put homemade guava-leaf water, juice, tea, or extract directly into your eyes. Homemade preparations aren’t sterile and could introduce bacteria or other contaminants. Traditional eye remedies are widely used, but their safety and effectiveness have not been adequately established.
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Pakistan Journal of Ophthalmology
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For uncomplicated tired or mildly irritated eyes, safer measures include:
Resting your eyes, particularly after prolonged screen use.
Using a cool, clean compress over closed eyes.
Avoiding rubbing your eyes.
Using preservative-free artificial tears if dryness is the problem.
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Cleveland Clinic
If redness comes with eye pain, blurred or reduced vision, strong light sensitivity, significant discharge, swelling, severe headache, nausea/vomiting, or an eye injury, seek prompt medical attention.
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Mayo Clinic
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Bottom line: Guava leaves may be fine as a food or beverage, but they should not be used as a homemade eye drop or eye wash.
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