H-PRK & H-LASIK


H-PRK - Hyperopic Photorefractive Keratectomy

H-LASIK - Hyperopic Laser-Assisted in Situ Keratomileusis

Refractive Error Correction

  • Hyperopia - Long sightedness or farsightedness.  This is corrected by making the central cornea steeper.  This is accomplished by directing the laser beam to remove tissue from around this area.
  • Astigmatism - This is corrected by using a laser to reshape the steepest part of the cornea to make it more spherical.

H-PRK (also known as H-PARK) is similar to PRK laser eye surgery but is slightly more complex.  Like all other laser eye procedures, an excimer laser is used to reshape the cornea.  This enables light rays to focus properly on the retina at the back of the eye.  H-PRK works by correcting mild to moderate farsightedness (hyperopia) and astigmatism, at the same time.  If you have severe farsightedness, H-PARK may not be suitable as results can be unpredictable and there is a high risk of complications.   

The procedure for H-PRK is very similar to PRK.  It is a same day procedure using local anaesthetic.  Laser eye surgery generally is very quick with the laser being applied to the eye for just a matter of minutes.  In Hyperopic Photorefractive Keratectomy surgery, the laser is applied for slightly longer.  Overall, the treatment time does not usually exceed half an hour and then you can be discharged.

Following Hyperopic Photorefractive Keratectomy, you may be required to wear an eye shield, or a bandage to protect the eye from particles in the air and from eye contact.  A special contact lens may be worn for the first few days.  To reduce the risk of infection, it is crucial that you take any prescribed medication.  Recovery can be quite painful compared with LASIK and usually takes longer.  Vision will be impaired for the first few days as the surface of the eye heals naturally.  Follow up appointments will be made a few days following the procedure and during the following months. 

H-LASIK surgery is often preferred over H-PRK due to its faster healing time and faster visual recovery.  The procedure involved in H-LASIK is essentially the same as LASIK surgery. 

If you are considering laser eye surgery, contact your local laser eye surgery clinic to find out about which procedures they offer.  Visit the Find page, to locate a clinic near you.

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