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It is very unlikely that cottonwool will cause any corneal epithelial defect.
So you are saying that the epithelial layer won't just get exposed by my cleaning accident earlier?
If at all you feel that there has been an exposure of the corneal epithelium again, you will experience severe pain, excessive watering of that eye, redness. In that case simple patching of the eye with lubricating eye ointment for 1 day is sufficient for it to heal.
Thank you Dr Desai. You have been very helpful!