All are features of optic nerve injury except ?
Ans. is 'd' i.e., Intact contrast sensitivity Signs of optic nerve damage are as follows: Visual acuity is usually reduced markedly. Colour vision is often severely impaired. Pupil shows ill-sustained constriction to light. Marcus Gunn pupil which indicates relative afferent pupillary defect (RAPD) is a diagnostic sign. It is detected by the swinging flash light test. Visual field changes. The most common field defect in optic neuritis is a relative central or centrocaecal scotoma. Contrast sensitivity is impaired. Visually evoked response (VER) shows reduced amplitude and delay in the transmission time.
Decreased acuity
Decreased colour vision
RAPD
Intact contrast sensitivity