Causes. The exact cause of optic neuritis is unknown. However, optic neuritis is believed to develop when the immune system mistakenly targets the substance covering your optic nerve (myelin), resulting in inflammation and damage to the myelin.he following autoimmune conditions often are associated with optic neuritis: Multiple sclerosis. Multiple sclerosis is a disease in which your autoimmune system attacks the myelin sheath covering nerve fibers in your brain and spinal cord.
See how you can use online check-in (see below) to print your boarding passes from home any time within 24 hours of your flight. And at certain airports, you can go completely paperless by having an eBoarding Pass delivered to your mobile device. Check In Now. How to Use Online Check-in.
You will receive your boarding card at the train station check-in once you have handed over your baggage. You can find more information on the check-in service at SBB Website or call 0900 300 300 (CHF 1.19/min.).