Long-Term Exposure to Urban Particulate Matter on the Ocular Surface and the Incidence of Deleterious Changes in the Cornea, Conjunctiva and Retina in Rats.

However, the increased thickness was reduced to normal levels at 4 weeks, a decreasing trend was shown at 8 weeks, and the thickness was significantly decreased at 16 weeks.

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The score at 8 weeks did not recover by 2 weeks of rest, although at 2 and 4 weeks, it showed a trend of recovery after 1 week of rest.

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