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Internuclear Ophthalmoplegia (I.N.O)

 
  1. Due to lesion of MLF (Medical longitudinal Fasciculus)
  2. Defective adduction of ipsilateral eye
  3. Nystagmus of the contralateral abducting eye
  4. WEBINO [Wall eyed bilateral internuclear ophthalmoplegia]
  1. Due to lesions involving paired medial rectus subnucleus
  2. Defective convergence and adduction
Example
A person having limitation of adduction in left eye. In right eye saccadic movement on abduction and normal convergence. What is the most probably diagnosis? (AIIMS May 09)
A. Internuclear ophthalmoplegia                                     
B. Congenital absence of MR
C. Partial third nerve palsy                                
D. Duane's retraction syndrome
Solution
Ans .A) internuclear ophthalmoplegia




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