Hess Charts Interpreted

Example
 

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Example of a left and right eye Hess chart.
 

The above Hess chart shows:-

The right eye is primarily affected, indicated by its smaller field

Underaction of the right lateral rectus (primarily affected muscle)
Overaction of the left medial rectus (muscle sequela)
Overaction of the right medial rectus (muscle sequela)
Underaction of the left lateral rectus (muscle sequela)

Diagnosis: Right Sixth Cranial Nerve Paresis

The book gives a step by step description of how to interpret Hess charts like the one above and use them to aid in reaching diagnoses.

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