Received: 6 January 2020
Accepted: 4 May 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: The work is ethically approved by the Scientific Research Committee of the Research Institute of Ophthalmology RIO, Egypt, prior to the beginning of the study. Corneal scrapping samples used in the study were obtained after patients’ consent.
: Not applicable.
: The authors declare that they have no competing interests.