Presbyopia can be corrected with several different techniques. Since the eye can no longer change its focus in a natural and progressive way, any vision correction technique is a compromise between making the patient free of reading glasses for most near tasks, and the quality of vision at distance. The solution that our specialists will propose to you will depend on your eye health, your lifestyle, and your expectations.
This technique corrects one eye for far and the other for near. It can be used with Lasik or with intra-ocular lens implants. The main benefit is independence from eyeglasses or contact lenses. The main disadvantage is that the 2 eyes are imbalanced and that 3-dimensional vision (depth perception) is compromised. Some patients cannot tolerate this imbalance. The only way to verify if you are a candidate for monovision is a trial with contact lenses over several days. In our experience, about 75% of patients are able to tolerate this imbalance and are happy with monovision.
MULTI-FOCAL LASER EXCIMER (LASER BLENDED VISION)
This technique performed on the Zeiss MEL-80 laser is an adaptation of monovision. A multi-focal cornea is created in each eye in order to increase the depth of focus. The main disadvantage is that this multi-focality will slightly reduce the quality of vision, especially at far. Several of our Canadian colleagues now perform Laser Blended Vision, and we are closely following the development of this promising new technology.
CORNEAL IMPLANTS (AcuFocus KAMRA and others)
These implants correct presbyopia by inducing mild short-sightedness in one eye (similar to monovision), while partially preserving the distance vision. As of October 2013, the KAMRA device is the only such implant approved by Health Canada.
Laservue was the first clinic in North America to offer this technology, and first performed AcuFocus KAMRA surgeries in October 2012. Doctors Mullie and Balazsi believe that this technology is very promising and will rapidly develop over the next 5 years.