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Idowu is employed by AbbVie Inc. as a Medical Science Liaison. Other authors have no conflict interests.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"Ethical approval was gotten from LUTH Health Research Ethics Committee (ADM\/DCST\/HREC\/APP\/2716). The study adhered strictly to the tenets of the declaration of Helsinki.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Written informed consents to participate in the study were obtained from participants after a concise but detailed explanation of the study.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to participate"}},{"value":"This paper is part of a dissertation submitted to the West African College of Surgeons in part fulfilment of the award of Fellowship of the West African College of Surgeons (Ophthalmology), October 2020. 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