**Acknowledgements**

Author would like to acknowledge Susi Heryati, Angga Fajriansyah, Arief Mustaram, Patriotika Muslima, and Elfa Ali Idrus as supervisors in Infection and Immunology Division, Department of Ophthalmology, Cicendo National Eye Hospital, Bandung, Indonesia.

## **Conflict of interest**

The author declares that there is no conflict of interest in this work.
