<prompt> Dryness of eye is caused by injury to facial nerve at:Chorda tympaniVertical segmentTympanic segmentGeniculate ganglion  <response>: d Geniculate ganglionRef. Cummings, 6th ed., 2606Whenever there is injury before or at the origin of the greater superficial petrosal nerve i.e. before or at the Geniculate ganglion which is responsible for lacrimation there will be dry eye on the same side.Tympanic segment, Vertical segment and Chorda tympani all are beyond the geniculate ganglion. 