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How to navigate when you are blind.

Posted in 'General' on April 15, 2015 by Stuart Macfarlane

Daniel Kish has been blind since he was 13 months old, but has learned to "see" using a form of echolocation. He clicks his tongue and sends out flashes of sound that bounce off surfaces in the environment and return to him, helping him to construct an understanding of the space around him. In a rousing talk, Kish demonstrates how this works and asks us to let go of our fear of the "dark unknown".


 


 



Eyelid Twitching (Myokymia)

Posted in 'General' on April 19, 2015 by Stuart Macfarlane

 

Eyelid twitching is also know as eyelid myokymia. It generally occurs in one eye at a time and usually involves the inferior eyelid. There will occur an intermittent twitching, jumping or quivering of the lower lid. Occasionally the superior lid can be involved. Eyelid myokymia results from fascicular contractions of the orbicularis oculi muscle and may occur intermittently for days to months. 

Rarely the eyelid contractions can be so severe that they cause the eyeball itself to occcilate or quiver, intermittently blurring the vision. 

The condition is benign and self-limiting. 

Contributing factors are fatigue, excessive caffeine or alcohol and stress. There is also sometimes an association with ocular allergies. Modifying the contributing factors should help resolve the myokomia and some patients find that applying a warm pack to the eyelid helps reduce the symptoms. 

If the twitching or myokymia extends to the face then advice should be sought immediately.