<prompt> Pupillary reaction to light is still normal in lesioninjury toOptic nerveOptic discOptic tractOptic chiasm  <response>: Ans. b Optic disc Optic disc is not involved in papillary light reflex. Pathway of papillary light reflex:Retina - Optic Nerve - Optic Chiasma - Optic Tract - Prerectal Nucleus - Edinger Westphal Nucleus - Inferior Division of 3rd Nerve - Ciliary Ganglion - Short Ciliary Nerves - Sphincter Pupillae 