The lens inside our eye helps us to focus.  As we get older, the lens becomes stiffer, making it difficult to focus.  It also gets darker, blocking light entering the eye. This is called a cataract.  Currently, cataract can only be treated by surgery.  During cataract surgery, the lens is removed and replaced with an artificial lens, called intraocular lens (IOL).

Like spectacles which can be made of different materials with many added options, IOL are generally made of silicon or acrylic.  A lot of options can be added to the IOL.  These options include correcting for far-sightedness, near-sightedness, astigmatism, near vision and special coating to block ultraviolet light.  The choice of intraocular lenses will be discussed with you at the time of consultation.





Choice of Intraocular Lens (IOL)



  • Basic IOL

This is the only IOL covered by OHIP.  It comes in one correcting power.  The surgeon usually selects the power which enables the patient to see distant objects.




  • Basic IOL with UV block

This is basic IOL with a special coating to reduce UV light entry into the eye.  It is not tinted like sunglasses and does not change color.





  • Toric IOL

Not everyone has a perfectly spherical eye.  Therefore, some patients need astigmatic correction in their glasses.  The astigmatic correction can be put in the IOL instead of glasses.




  • Multifocal IOL

This lens carries more than one correcting power.  Like progressive glasses, patient uses this IOL for both distance and near vision.  It is designed to decrease dependency on reading glasses after cataract surgery.



  • Monovision IOL

This is a special technique that utilises the basic IOL covered by OHIP to allow patient to be less dependent on reading glasses after cataract surgery.  The surgeon will implant a slightly different power of IOL in each eye, enabling one eye seeing better for distant vision and the other eye better for near vision.  Most patients do not notice the difference between the two eyes unless they cover one eye.  Dr. Chiu has a lot of patients who enjoy monovision.

To learn more about monovsion cataract surgery, please click the link Here.

Recently, we also have the option to pre-cut the wound and the cataract with femtosecond laser just prior to cataract surgery.  This is called Femtosecond Laser Assisted Cataract Surgery (FLACS)