Clinical Characteristics of Nystagmus in Albinos Living in Libreville

作     者：Prudence Ada Assoumou Tatiana Mba Aki Olele Oussavou Emmanuel Mve Mengome 

作者机构：Department of Ophthalmology Faculty of Medicine University of Health and Science Libreville Gabon Ophthalmology Department of Agondje University Hospital Center Libreville Gabon 

出 版 物：《Open Journal of Ophthalmology》 (眼科学期刊（英文）)

年 卷 期：2020年第10卷第1期

页      面：69-76页

学科分类：08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主　　题：Nystagmus Albinos Libreville 

摘      要：Introduction: Nystagmus is a static ocular disorder characterized by an oscillatory, involuntary and rhythmic movement of eyes. In Libreville, no data on the subject is available. The purpose of this study is to describe clinical characteristics of nystagmus in albinos living in Libreville. Methods: This is a descriptive, cross-sectional study including 43 albinos with oculocutaneous albinism and nystagmus during the period from February 01, 2017 to February 01, 2018. Variables studied were age, sex, visual acuity, objective refraction, characteristics of the nystagmus including morphology, direction, intensity and associated signs such as stiff neck and squint. Results: The mean age was 21.2 ± 17 years with a female-dominated ratio of 0.53. The visual acuity from afar without correction (AVLSC) was less than 3/10 in 88.4% of the cases. The most common ametropia was astigmatism in 51.2% of cases. Nystagmus was present in all albinos. The spring type was found in 69.7% of cases. The direction was horizontal in 67.4% of the cases and rotary in 32.6% of the cases. The intensity was moderate in 55.8% of cases. The blocking position was the primary near vision position in 69.7% of the cases. Nystagmus was associated with a stiff neck in 28% of the cases and strabismus in 48.8% of the cases. Conclusion: The albinos nystagmus living in Libreville is of the spring type, horizontal direction, of moderate intensity and calmed in the primary position in near vision.