Possible Clues:

• With 35-Across, it sends electrical impulses to the brain
• One sees church language initially suppressed
• Picot (anag.)
• One might have the nerve to be seeing it in a cop
• First sign of pain penetrating in ear or in eye
• Having disruptive pressure of the ear or the eye
• Sort of nerve through which spirit?
• Subject moves head to centre of vision
• Pub measure
• It is a measure of the viewer