What is the Ideal Age to Have Lasik Eye Surgery?

As a general rule, we recommend that patients are at least 21 years of age for LASIK or PRK vision correction. Some patients have been treated younger than this with excellent and stable results and the minimum is probably 18. More important than age is the health of the eyes and the stability of the refraction. This means that the eyes are no longer changing for the previous year so that the treatment has a higher likelihood of being permanent.
One benefit of being younger is that there are more years to enjoy the benefit of improved vision, the eyes tend to heal quicker and stabilize faster, and there is less side effects with things such as dry eyes. There is also less problems with reading vision than in older patients.
At first LASIK seemed to be most popular with an older demographic of average age around late 30's or early 40's but now we are seeing many more generation Y patients in their 20's who have discovered the benefits of laser vision correction.

Many people spread the rumor that you must be 18 or 21 or sometimes even 24 to have laser eye surgery. Many surgeons even put forth age requirements in their practice. In reality, the only critical factor is stable vision. If you visit your optometrist annually, take note of how often your prescription changes. If your prescription has not changed in a while than your refractive error has stabilized and you are ready for treatment. Some people stabilize at 18 and other at age 21. In addition, some people who are 21 are still experiencing changes in their vision. 
I have been seeing many younger and younger people coming into my practice having amazing experiences with Lasik. As a general rule, most people are clear to have Lasik at 18 but the important thing is to ensure your vision is stable.

There isn't a perfect age to have LASIK, because there are different considerations for surgery at different ages. Although FDA approved (for certain prescriptions) at age 18, I like to wait until 21 before I offer the surgery in my practice. This gives us a couple years to see stability in refraction, and a few years of college for some (extensive reading years). Invariably, when I do surgery on 30+ year olds they regret not having done the surgery in their 20s. Unfortunately many patients don't have the money needed for the surgery until their 30s (so they couldn't control that situation anyways). The most difficult time to get lasik is probably right at age 40. That's because this is right when patients are starting to strain while reading, and LASIK may exacerbate the situation if a customized surgical plan is not reviewed at length in advance. This same issue is less of a problem by age 50 because patients are well aware of their visual limitations and either really WANT to read without glasses, or don't care much and just want to be able to do sports/drive a car/etc without glasses. 
So in summary, the best time (in my opinion) to get LASIK is when you are at least 21, you're a good candidate, and you have the money. There are very few things in life you can invest money into that you will use every single day, all day long, for potentially decades without needing additional enhancements (which, in many practices, doesn't cost the patient anything out of pocket even decades later).

You want to wait until your eyes have stopped changing, a condition that we refer to as ocular maturity. For most people, this happens by age 18, though in rare cases the eyes will continue changing in the early twenties. There is no upper limit on the age of a Lasik patient, though people in their 60s start to have cataracts and other options for vision correction could be considered. Within this age range there is no "ideal" age.

The minimum age to have LASIK is 18 and there isn't an ideal age to have the procedure. For most people, their eyes stop growing after the age of 18, although there can continue to be refractive changes to their vision throughout life.To decrease those changes, we recommend all of our patients to take a 20-second break each day that involves looking into the distance for every 20 minutes of near-work-activity performed. This will help to decrease the changes in your vision as a result of near-work-activity induced myopia.

There isn't an ideal age for LASIK, per se; multiple factors need to be considered at every age. That being said, I do not consider laser correction until the patient is at least 21 years of age. This is because when we are young, our prescription frequently changes, and certain eye disorders may not be apparent prior to our early 20s. For the most part, LASIK works very well in our mid 20s, 30s and early 40s because our eyes typically stabilize by this point, and we still have the ability to use our eyes to focus on near objects (i.e. read without "cheaters"). As we age, we lose that ability, and so we need reading glasses, even after having LASIK.  After age 40, I pay close attention to hobbies and visual demands, and carefully outline realistic goals and expectations after surgery. For example, a 45 year old athlete may be alright with reading glasses, but she would love to be able to compete in a bike race without glasses or contacts. However, a 50 year old book worm would see little benefit from correcting his nearsightedness (which is what he uses to read).Regardless of age, I decline cases when other issues are present, such as cataracts, bad diabetes, glaucoma, keratoconus or macular degeneration.