Refractive surgery is a procedure to reshape the cornea to provide good vision without glasses or contact lenses. A laser is used to remove corneal tissue and produce a new refractive surface. It is used to correct myopia (nearsightness), hyperopia (farsightness) and atigmatism.

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This surgery is where the latest technology in Ophthalmology is usually applied. New diagnostic equipments, better treatment algorithms, more precise lasers bring even more safety to this amazing surgery. The introduction of the excimer laser in Ophthalmology, more than 25 years ago revolutionised the way refractive errors were treated. Before the laser was introduced, a diamond blade was used to cut the cornea to promote flattening and, thus, reduce nearsightness. However, this procedure was not precise and under- and over-corrections were usually obtained. The excimer laser, on the other hand, promotes a precise reshaping of the cornea by ablating tissue with controlled laser pulse delivery.