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Authors
Shazali, Rayan Hisham Salaheldin
Mohamed, Sagad Omer Obeid https://orcid.org/0000-0003-0597-2397
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Article History
Received: 10 April 2021
Accepted: 24 May 2021
First Online: 12 July 2021
Declarations
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: The institutional review board of Faculty of Medicine, University of Khartoum, granted permission for conducting this research before study initiation. Besides, permission was taken from the director of the Sudanese National Association of the Blinds. Informed verbal consent was approved by ethics committee. Accordingly, verbal consent was obtained from each participant. The respondents were also informed that they have full right to withdraw or refuse at any time from the process and the confidentiality of the personal information will be kept properly. There was no committee’s reference number.
: Not applicable
: The authors declare that they have no competing interests
