<prompt> Gun barrel vision is seen inClosed angle glaucomaPapillaedemaNuclear cataractAll of the above  <response>: B Papillaedema GUN BARREL VISION that appears as when looking through a Tunnel or Gun Barrel. Common Causes:1. Glaucoma Late- Chronic open angle glaucoma2. Retinitis pigmentosa3. Post-papillaedema optic atrophy4. Hyaline bodies Drusen of optic disc5. Bilateral occipital infarcts with macular sparing6. Malingering or Hysteria7. Blood loss8. Hallucinogens9. Extreme fear10. Pituitary stalk tumour11. Severe cataract12. Migraine aura13. Altitude sickness14. Hypoxia Less common Causes:1. Panic attack2. Exposure to hydraulic fluids3. Intense anger 