Question

In RLR paresis, the primary deviation occurs when:

a)The right eye fixates
b)The left eye fixates
c) Both eyes fixate simultaneously
d) None of the above

Answer 1

In RLR paresis, the primary deviation occurs when the left eye fixates.

Step-by-step explanation:

The primary deviation in RLR paresis occurs when the left eye fixates. In RLR paresis, the right oculomotor nerve (or Edinger-Westphal nucleus) is damaged, causing the direct reflex to be lost and the consensual reflex to be intact. As a result, when light is shined in the left eye, the left pupil will constrict while the right pupil does not. This is the primary deviation in RLR paresis.