1. The pupillary light reflex is later named the Whytt Reflex. 2. This indicates an intact direct and consensual pupillary light reflex . 3. This is a characteristic feature of LEMS . The pupillary light reflex may be sluggish. 4. For normal pupillary light reflex , both pupils constrict simultaneously when light is shone into either eye. 5. There has been recent research on the role of melanopsin in pupillary light reflex ( PLR ). 6. Therefore, light shone into one eye causes ipsilateral direct pupillary light reflex and contralateral consensual pupillary light reflex . 7. Therefore, light shone into one eye causes ipsilateral direct pupillary light reflex and contralateral consensual pupillary light reflex. 8. This may be noticed by a decreasing level of consciousness, loss of the pupillary light reflex , and abnormal posturing. 9. For examples : An animal with polioencephalomalacia will lack the menace reflex, but will still have the pupillary light reflex . 10. Pupillary light reflexes are usually reduced but present; the slow phase mediated by melanopsin in retinal ganglion cells is retained.
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