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PRELEX® (Presbyopic Lens Exchange)

Correction of presbyopia now possible through PRELEX surgery!

PRELEX (Presbyopic Lens Exchange) is a procedure used to correct presbyopia for patients over the age of 45 who want to reduce their dependence on reading glasses. Using the same procedure that has been used for millions of patients undergoing cataract surgery, the PRELEX procedure involves removing the eye's natural lens and replacing it with an artificial lens implant. With the PRELEX procedure, multi-focal intraocular lenses are used that allow the eye to focus for distance and NEAR - unlike other methods of refractive surgery which alter the shape of the cornea.

Although the PRELEX and cataract procedures are the same, the reasons for performing the surgery differ. While cataract surgery is done to remove a patient's cloudy lens; PRELEX is used to correct presbyopia and distance vision thereby reducing a person's dependence on glasses or contact lenses.

PRELEX is used for the following types of patients:

  • Patients with very high levels of nearsightedness or farsightedness.
  • Patients who wish to eliminate their dependence on bifocals or reading glasses.
  • Patients who have corneas that are too thin for LASIK.
  • Patients who may be showing signs (even without symptoms) of developing cataracts.

How Can I Benefit from PRELEX?

  • Recovery of unaided distance vision (no glasses needed for driving in over 99% of patients).
  • Recovery of near vision in PRELEX patients with the ReSTOR multifocal lens (no glasses needed for reading in over 80% of patients).
  • Prevention of cataracts: With PRELEX surgery, the risk of developing a cataract (or clouding of the lens) in the eye is completely eliminated. (Cataract surgery is required in over half the population by age 80 and occurs at a significantly younger age in patients with large refractive errors).
  • FDA data shows that following PRELEX surgery with the Alcon RESTOR intraocular lens:
    • 80% of patients never wore glasses
    • 17% of patients sometimes wore glasses

CATARACT MD's experienced ophthalmologists use the very latest, state-of-the-art lenses and techniques for PRELEX surgery. CATARACT MD doctors are currently using the Alcon Acrysof ReSTOR intraocular lens, as clinic studies have shown it to be the most effective lens for the correction of presbyopia, with over 80% of patients no longer requiring glasses following surgery. Through CATARACT MD's close affiliation with LASIK MD, our doctors can perform LASIK following PRELEX which allows 99% of our patients to no longer need glasses to drive following surgery.

Alcon's ReSTOR Intraocular Lens (IOL)
Allowing PRELEX Patients to See Both Near and Far Without Reading Glasses!

CATARACT MD currently uses Alcon's ReSTOR Intraocular Lens (IOL) for PRELEX. This lens can substantially restore a patient's ability to see both near and distant objects without the aid of reading glasses or bifocals. The ReSTOR IOL's innovative lens optics allows for a greater range of accommodation, thereby eliminating or significantly reducing dependence on reading glasses following surgery - without compromising on distance vision. More people are candidates for Alcon's ReSTOR than most other lenses. The ReSTOR lens is used for PRELEX, Refractive Lens Exchange (RLE) and Cataract patients.

The benefits of the ReSTOR lens include:

  • Quality vision at various distances, allowing patients to see both near and far without the use of reading glasses or bifocals.
  • A greater number of patients are candidates for this type of lens than for most other lenses.
  • In IOL clinical trials, the ReSTOR provides the highest level of spectacle freedom to date.
  • Works with your pupil to provide quality range of vision in all lighting situations.

To see how Alcon’s ReSTOR intraocular lens works in different situations, please click on the link of your choice:


As we age, the natural crystalline lens of the eye may lose some of its elasticity and thereby its ability to accommodate to nearby objects. This condition, known as presbyopia, usually begins around the age of 40 and can most often be comfortably corrected through the use of reading glasses, contact lenses and specialized fitting techniques. Read more.