Choosing your Cataract Implant

At Vision Rejuvenation™ Victoria (VRV) we use only the finest quality of Intraocular Lens Implants.
The choice of which type of implant to use for a given individual is dependant on the presence of certain eye diseases, past injury or previous ocular surgery, as well as the presence of any spectacle prescription.

The power of the lens selected is customized to each patient based on a computer analysis of:

  • Existing refraction (ideal spectacle strength)
  • Desired refraction after surgery (distance, intermediate or near vision desired).
  • Type of IOL Implant to be used
  • Length of the eye
  • Anterior chamber depth
  • Natural lens thickness
  • Corneal diameter

Lens Types

Hard or Non Folding Lenses

Hard lenses (PMMA plastic) or Non Folding IOL’s are an older generation, implant made of a hard plastic material.  Because they are inflexible and large the incision that the surgeon has to make is correspondingly large, about 6mm.

Post operatively there is a longer healing time than with folding lenses. This type of implant will provide good, clear vision at a fixed range. You will most likely have to wear spectacles after your surgery to fine tune some or all ranges of focus. This type of implant is performed at the Royal Jubilee Hospital (RJH) and is covered by BC health.

Soft or Folding Lenses

Folding IOL’s are made of a softer, more flexible material than non folding lenses and can be inserted through a smaller incision.  For folding lenses, the incision measures 2.6mm.

Post operatively there is less irritation and discomfort than with non folding lenses. Visual recovery is more rapid and the vision is more stable.  Night contrast is also better.  As with the non foldable IOL, the foldable implant is also designed to provide good, clear vision at a fixed range, therefore, you will most likely have to wear spectacles after your surgery to fine tune some or all ranges of focus.

This type of implant surgery may be performed at the RJH.  The medical services plan does not cover the cost of the IOL. But does cover the cost of the surgical procedure.

For Refractive Lens Exchange (RLE) Surgery and Refractive Cataract Surgery only foldable lenses are used except for some specialized situations where previous injury or surgery has damaged the support structures required for placing the foldable lens.

Monofocal or Multifocal Lens Implant?

Monofocal Implant

If a monofocal implant is chosen, then a limited but very useful range of clear vision (depth of field) results. We generally aim to place the focal length of the two eyes at slightly different distances so that the range of clear vision binocularly is greater. With this method we can generally achieve fairly good distance and mid-range vision without glasses. While these patients may see large print without glasses, most require reading glasses for small print.

Patients who would prefer mid and near vision but wear spectacles for distance can have this also, although this is a rare request.

Multifocal Implants

At Vision Rejuvenation™ Victoria (VRV) we have eight years of experience with multifocal implants. These lenses allow simultaneous distance, mid-range and near vision without glasses. However, the best multifocal lenses currently available usually leave the mid vision (computer, arms length work) weakest of the three. Multifocal lenses are associated with some loss of contrast vision and small halos around lights at night. Individuals with certain eye problems are not good candidates for these lenses.

In spite of these limitations, most people are pleased with their vision with multifocal lenses. They are more costly than Monofocal implants, and require the greatest degree of adaptation on the part of patients.