Refractive errors

Refractive errors are caused the light that enters the eye not focusing on the correct part of the retina. This impairs vision. However, refractive errors can easily be corrected with laser surgery. 

Refractive errors are classified into three main groups: short-sightedness, long-sightedness and astigmatism.

Short-sightedness (myopia) means that the light that enters the eye focuses in front of the retina. A short-sighted eye sees well at short distances, but distant objects are unclear. During laser surgery, the cornea is reshaped to focus the light in the correct spot.

Long-sightedness (hyperopia) is caused by the light focusing too far back. A long-sighted eye sees distant objects more clearly that close objects. During laser surgery, the long-sightedness is corrected by reshaping the cornea.

Astigmatism is caused by the eye refracting light rays from different directions differently. Astigmatism often coincides with short- and long-sightedness. It can be treated by reshaping the cornea.

If you are considering laser eye surgery, we recommend that you make an appointment for a free evaluation. The evaluation consists of an interview and an eye examination performed by our optometrist. The thickness of the cornea is also measured. The evaluation takes 15-20 minutes. Make an appointment for a free evaluation by calling 09 7750 8111 or filling in the contact form. 


Ihanamäki Tapio


MD, Specialist in Ophthalmology and Neuro-ophthalmology, Eye Surgeon. Cataract surgery, YAG laser treatments for posterior capsular opacification (PCO), laser treatments for glaucoma, selective laser trabeculoplasty (SLT), LASIK laser eye surgery, PRK laser eye surgery, neuro-ophthalmology (diagnosis), eye diseases (diagnosis and treatment)