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Welcome and thank you for your question.
Do you have any irritation or difficulty in vision in the eyes?
Are your eyes watering? Do you have any pain?
I will review your answers and reply again in a few minutes.
Then you have no cause for concern - your eyes have not been damaged in any way by the grit and dust and are OK.
Any irritation you have can be decreased by using lubricant eye drops like Refresh tears which are very similar to natural tears.
No, the eyes are rarely damaged by street grit or dirt unless the cornea gets scratched - and scratching of the cornea woulkd have caused watering and blurred vision.
Since you have neither, you have no cause for concern.
It is very unusual to have corneal scratches from ordinary street grit..