ReLEx and PreLEx

Refractive Lens Exchange (ReLEx) is the name given to the surgery wherein the natural lens of the eye is exchanged with an artificial lens (IOL). Normally this is done when the natural lens becomes cloudy, a condition called cataract. However, when this surgery is done before the development of cataract, in order to remove glass power, it is called ReLEx.

Just as cataract surgery is one of the safest surgeries performed around the world, so is ReLEx. This surgery is especially suitable for patients in the presbyopic age group with very high glass power who cannot undergo LASIK or other procedures. When this kind of lens exchange is done in patients in the presbyopic age (>40yrs) it is referred to as PreLex.

The natural lens is substituted with an artificial intraocular lens (IOLs) like multifocal or trifocal lenses whose optical properties provide the patient with good distance, intermediate and near vision. This reduces the dependency on glasses for everyday work. Occasionally a small power may be required in some patients for fine work, both for distance and near.


  1. Will I need my glasses after surgery?
    ReLEx or PreLEx is a surgery done in patients who are absolutely dependent on glasses for all their daily activities and hence want to get rid of them. Once the natural lens is substituted with IOLs like multifocal and trifocal lenses which give excellent vision, the dependency on glasses is greatly. This means that the patient will get good quality vision for both near and distance without wearing glasses. Glasses may be occasionally needed, based on each patient’s individual perception.
  2. At what age can I get this surgery?
    You can have this surgery right from the age of 20 years to before the cataract actually develops. It is a procedure which replaces your natural lens with an artificial intraocular lens whose power is calculated according an individual’s eye. It is a customized approach which takes into account the personality of the individual, the nature of his or her profession, and hobbies such as reading, watching television, etc. to give maximum comfort after surgery.