The Neurology of Eye Movements

red_hairball_dancing_903A new edition of Leigh & Zee is always cause for celebration, so I jumped for joy when my copy of the just published 5th edition arrived in the mail yesterday.  You can do some Google previewing here.

Leigh & Zee

So many lovely insights to share.  Here’s a quick one, from Page 6:  “To move the eye, it is necessary to overcome impediments imposed by the orbital supporting tissue through viscous drag and elastic restoring forces.”   Why is that so profound?  There’s a popular notion that eye coordination issues between the two eyes, as in strabismus, have little to do with the strength of the eye muscles.  It has been claimed that the eye muscles are 200 times stronger than they need to be just to move the eyes.  That has been used to bolster the argument that eye muscle surgery should be a last resort in the treatment of strabismus — a sort of shock therapy, or perhaps the EOM analog of gastric bypass surgery.  Think about the quote above, and you’ll realize that there is more to this than meets the eye.  To be continued …

2 thoughts on “The Neurology of Eye Movements

  1. Thank you very much for this series on this book on the neurology of eye movements. Don’t leave me hanging here though! It is indeed a very interesting quote. I can certainly feel the ‘viscous drag and the elastic restoring forces’. Of course, these are mostly surgery induced in my case. Muscle strength and muscle training certainly is a factor in VT. It is part of it. What are the implications of that quote according to you? Thank you for answering!

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