Multi-focal implants allow focusing to occur at multiple distances by using light that enters in different parts of the eye to focus at different distances. This renewed focus sometimes comes with a loss of sharpness when compared to a mono-focal implant, but multi-focal lenses often reduce or eliminate patients’ need for corrective lenses altogether.
Multi-focal IOLs are made up of concentric circles, which vary to allow the eye to focus at different distances. The center of the lens provides distance power, with each surrounding ring being used to stabilize vision at intermediate and close range.
Remember, some eyes take longer than others to grow accustomed to a multi-focal lens, and the potential exists for problems with halos and glare, particularly at night. However, such problems have been limited and usually improve over time. Patients experiencing these difficulties tend to still experience better vision than prior to having the lens implanted.
Learn more about the Multi-focal lenses used at Vance Thompson Vision:
The LASIK procedure is the right answer for most patients who are considering refractive surgery to improve their vision. However, in patients with higher degrees of nearsightedness or farsightedness, the cornea may be too thin to allow full refractive correction.
In these cases, surgical implants may be the best alternative. These special devices are placed in the eyes to improve their focusing ability.