functional blindness造句

• Symptoms can range from a simple increased frequency of blinking to constant, painful eye closure leading to functional blindness.
• These were tested with collaboration of the Canadian National Institute for the Blind and the Canadian Council of the Blind by individuals with functional blindness.
• Patient groups quickly spread the word that there were now effective treatments for previously untreatable motility disorders such as blepharospasm, which can result in functional blindness despite an otherwise normal visual system.
• It found that the tactile feature was most useful to those with complete of functional blindness, but it was less useful for older individuals ( with decreased tactile sensitivity ) and the feature could not be detected on some banknotes owing to physical wear from use.