儿童弱视中的运动超敏锐度
Movement hyperacuity in childhood amblyopia.
作者信息
Kelly S L, Buckingham T J
机构信息
Department of Optometry, University of Bradford, West Yorkshire.
出版信息
Br J Ophthalmol. 1998 Sep;82(9):991-5. doi: 10.1136/bjo.82.9.991.
BACKGROUND
Amblyopia results in deficits in a number of visual functions in both the amblyopic and dominant eye. The present work describes oscillatory movement displacement thresholds (OMDT) in childhood amblyopia.
METHODS
The OMDT from the dominant and amblyopic eyes of 50 orthoptic patients (aged 74 (SD 16) months) were compared with those from a group of 24 controls (79 (21) months). OMDT were measured using a forced choice staircase procedure. Subjects were asked to identify which of the computer controlled monitors displayed the oscillating stimulus. Visual acuity and stereoscopic responses were noted from clinical records.
RESULTS
Amblyopic children demonstrating stereopsis showed no significant OMDT deficit in the amblyopic eye. Those children having no stereopsis had elevated OMDT in the amblyopic eye (p < 0.05). Results suggest that the dominant eye of children with amblyopia may also have a pattern of visual development which is anomalous (difference in correlation coefficient with age; p < 0.05).
CONCLUSION
OMDT deficits demonstrated in some amblyopic eyes indicate that amblyopia is incompletely described by its "clinical" definition. Results suggest that the dominant eye in those with unilateral amblyopia may not be "normal".
背景
弱视会导致弱视眼和优势眼的多种视觉功能出现缺陷。本研究描述了儿童弱视的振荡运动位移阈值（OMDT）。
方法
将50名斜视患者（年龄74（标准差16）个月）优势眼和弱视眼的OMDT与24名对照组（79（21）个月）的进行比较。使用强制选择阶梯法测量OMDT。要求受试者识别计算机控制的显示器中哪一个显示了振荡刺激。从临床记录中记录视力和立体视觉反应。
结果
表现出立体视觉的弱视儿童弱视眼的OMDT无显著缺陷。那些没有立体视觉的儿童弱视眼的OMDT升高（p < 0.05）。结果表明，弱视儿童的优势眼也可能有异常的视觉发育模式（与年龄的相关系数差异；p < 0.05）。
结论
一些弱视眼中表现出的OMDT缺陷表明，弱视的“临床”定义并不能完全描述弱视。结果表明，单侧弱视患者的优势眼可能并不“正常”。
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