By Stephen Beech

Laser correction for short-sightedness is "safe and effective" for older teenagers, according to a new study.

Short-sightedness, or myopia, affects around one-in-three children and teens, and research suggests that it is becoming more common.

A type of laser treatment, called photorefractive keratectomy (PRK), is widely used to treat myopia in adults, removing the need for them to wear glasses or contact lenses.

But questions have remained over its use in teenagers.

Study leader Dr. Avinoam Shye said: “Some doctors worry that the eyes of teenagers may still be changing or that their eyes might respond differently to healing after laser treatment, increasing the risk of side effects.

"However, in certain situations, teenagers do want permanent solutions to their myo

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