Stress
No matter how cute, working with children can be a challenge. Strange equipment, darkened exam rooms, and a few unknown faces can easily send a toddler into full melt-down mode. Thankfully mom and/or dad will be there to help you calm things down. What's more, you can always bribe them with a toy or treat. Hey, you're the professional here―whatever it takes to get a good exam done.
Far from being stressful, working conditions for orthoptists are actually pretty good. You work indoors, and you're spending about half your day sitting and half standing. There's no drawing blood or other unpleasant tasks some healthcare workers face to send your blood pressure up. Just as long as you don't try to pack too many appointments into the same day, your stress should be reasonably low.