| 翻訳と辞書 |
| Streff syndrome ： ウィキペディア英語版 |
Streff syndrome
Streff syndrome is a vision condition primarily exhibited by children under periods of visual or emotional stress.
Frequently patients will have reduced stereopsis, large accommodative lag on dynamic retinoscopy, and a reduced visual field (tubular or spiral field). Streff Syndrome was first described in 1962 by an optometrist, Dr. John Streff as Non-malingering syndrome. In 1962, Dr. Streff and Dr. Richard Apell expanded the concept to add early adaptive syndrome as a precursor to Streff syndrome. Dr. Streff believed the visual changes were induced by stress from reading. There is dispute on the taxonomy of functional vision defects. Some research indicates that Streff syndrome may be caused by a dysfunction in the magnocellular pathway of the retinal ganglion cells.〔Nimesh P. The use of frequency doubling technology to determine magnocellular pathway deficiencies. Journal of Behavioral Optometry, Volume 15. Number 2, 2005〕 These cells are only 10% of the retinal nerve cells and register motion detection.
(Early Adaptive Syndrome )
==Notes==
Most optometrists agree that Streff syndrome is a generalized reduction in visual performance that is not caused by disease. It is most common in girls ages 8 to 14. Most, about half, are under considerable emotional stress. Abnormal results on color vision or visual field testing is not uncommon. Visual field often presents as constricted 'tubular' at multiple test distances. The poor visual performance is strictly psychological, and treatments are usually to provide the patient with low powered reading glasses. The "relaxing" nature of reading glasses is believed to, over time, teach the stressed visual system to "calm down, relax", and visual performance usually returns to normal. Patients may also benefit from appropriate psychological therapy or medications.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Streff syndrome」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|