What could possibly go wrong? They feel fine and I see fine.....
Although the risk of serious complications from contact lens wear is very low providing that you follow the recommendations and instructions given to you by your doctor, the following link describes what can happen with poor contact lens care, overwear and routine overnight wear of contact lenses.
(Warning: The CNN article contains graphic photographs which some people may find uncomfortable to view.)
If you wear contact lenses, remember to follow your doctor's advice and recommendations, including proper wearing schedules, cleaning and disinfecting them as recommended, discarding them when you are supposed to, and following your doctor's follow-up schedule for regular examinations. The old expression "an ounce of prevention is worth a pound of cure" definitely applies!