You asked

How can my teen ensure she looks after her eyes?

Even if your teen is lucky enough to have perfect 20/20 vision, taking care of her eyes and protecting them against injury or infection is important in order to ensure they stay that way.
One of the best things your teen can do to protect their baby blues, baby browns or greens is to have them checked by an optometrist on a regular basis, at least every two years. It is however, to get them tested even more frequently if there is a family history of eye problems such as glaucoma or early cataracts. If your teen is complaining of having trouble seeing or that their eyes are hurting or bothering them, book an appointment straight away with an ophthalmologist.
An ophthalmologist is a medical doctor who specialises in examining, diagnosing, and treating eyes and eye diseases. An optometrist is not a medical doctor, but has been trained to diagnose and treat many of the same eye conditions as ophthalmologists, except for treatments involving surgery.

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