|
Irlen Spectral Filters or Irlen Lenses, are coloured overlay filters or person specific tinted lenses worn as glasses or contact lenses that are intended to help people with the supposed perceptual processing difficulty known as Irlen Syndrome, also known as Scotopic Sensitivity Syndrome or visual stress. For individuals who suffer from Irlen Syndrome, the brain is sensitive to specific wavelengths of light, resulting in difficulties with print clarity and stability and discomfort when performing visually intensive activities such as reading. Irlen Syndrome affects approximately 50 percent of individuals with reading difficulties and dyslexia, 33 percent of those with attention difficulties such as ADHD, 33 percent with autism, up to 50 percent of those who have suffered a traumatic brain injury, whiplash or concussion, and approximately 12-14 percent of the general population. Standardised diagnostic procedures have been developed to individualise the colour selection. Experts call the syndrome and the treatment controversial, because it is based on insufficient research.〔 However, current research on the topic includes placebo controls, longitudinal studies, and cutting-edge brain mapping technology, all of which support the use of color to alleviate the symptoms associated with Irlen Syndrome. ==Scotopic Sensitivity Syndrome== Scotopic sensitivity syndrome, also known as the Irlen Syndrome', is said to be a visual-perceptual defect related to difficulties with light source, glare, luminance, wavelength and black/white contrast. According to Irlen, these difficulties lead to reading problems, eye-strain, headaches, migraines, and other physical difficulties that can be alleviated by the use of person specific tinted lenses, known as Irlen Spectral Filters, worn as glasses or contact lenses. The syndrome has six characteristics: #photophobia #eye strain #poor visual resolution #a reduced span of focus #impaired depth perception #poor sustained focus The scotopic sensitivity syndrome is diagnosed by interviewing the client and by observing responses to certain visual tasks such as interpreting geometric figures and reading.〔(【引用サイトリンク】title=Testing & Treatment )〕 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「Irlen filters」の詳細全文を読む スポンサード リンク
|