Stupid article. I agree with most of the commenters on the site: writing for MSN is really zero stress, because you can write whatever crap you want without any research, and even be rewarded when it's a load of crap because it still does what it's meant to do: it drives a lot of traffic to the site!
How on earth could you ever rank engineering as less stressful than optometry? I had two highschool classmates who became optometrists. It took the same number of years to get their O.D. as it took for my co-op bachelors + accelerated masters, and to start they were making TWICE what I was making- as associates, without any of the stress of running a business. Once they decide to set up their own practice, they have the stress of being a small business owner, which is not inconsiderable- but if they run a good dispensary, they make huge margins on glasses which most people are too lazy to go elsewhere to obtain (and their company benefits make them even lazier). It's a very good gig.
The most stressful thing they have to do all day is send someone to the opthamologist so that THEY can tell the patient that they're going blind. The most harm you can cause is to prescribe contacts that don't fit right. They're prohibited in most locales from undertaking any procedure that is actually stressful.
Dull job? Repetitive? Perhaps- depends how much you like people. Terrible job for me, for sure, but it HAS to be one of the highest reward to stress ratio professions that exists!