Article History
Received: 25 September 2019
Accepted: 30 December 2019
First Online: 10 January 2020
Compliance with ethical standards
:
: Each of the authors declares that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the IRB of King Khaled Eye Specialist Hospital and with the 1964 Helsinki Declaration and its later amendments.
: This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.