Great questions. The higher amount of nearsightedness certainly contributed to your retinal tear. High nearsighted eyes always have thin spots in the retina which can become so thin that they break and cause a tear or hole in the retina. You absolutely did the right thing by having it lasered. The laser treatment acts as a spot weld surrounding the retinal tear and will prevent it from developing something more malignant like a retinal detachment. It is nearly impossible that the lasered retinal tear will create a detachment of the entire retina. I would have absolutely no concerns flying and do not recommend the need for you to see a doctor in the UK. Again, you did the right thing by having it lasered and there is no other treatment that would be required. You should have many years of good vision based on what you have told me. The name of the game with retinal tears is early detection and early intervention. At age 20 we certainly detected the problem early and you had it fixed via laser. There should be no concern whatsoever with this tear in the future. New tears or holes may occur, however, and they should be treated in the same manner as the first one. Yearly (or 6 month) exams are indicated for the rest of your life in order to detect any new holes or tears quickly. I would not lose sleep over the condition. It is extremely common and I can't stress enough that you have done the right thing by having it fixed. I will be available throughout the day to answer any followup questions you may have. Please consider leaving a positive rating when your questions have been answered fully.