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Home » Your Eye Health » Vision Over 40 » Multifocal Eyeglass Lenses

Multifocal Eyeglass Lenses

Multifocal lenses technically refer to any lens that provides more than one zone of corrective power and would therefore include bifocal, trifocal and progressive lenses. Multifocals are designed for the many individuals over 40 who struggle with presbyopia – the age-related near vision loss that requires us to use eyeglasses for reading and focusing on objects in our near vision. The multiple lens powers enable you to correct for near and distance vision with one pair of glasses.

Bifocal Lenses

Bifocal lenses are divided into two powers, one for distance vision and the second for near vision. Bifocals are created in a variety of designs with different sized and shaped viewing segments for near and far vision. While bifocals provide good distance and near vision, they are lacking in corrective power for intermediate areas, which is what has led to the development of trifocal and progressive lenses.

Trifocal Lenses

Trifocal lenses provide an additional lens power zone for intermediate vision (which is typically about an arm’s length away).

Some people are bothered by the visible lines where the lenses are divided in bifocal and trifocal lenses. In addition to aesthetics (the lines have become a sign of presbyopia which many associate with growing old), the harsh divisions in the zones can cause a distortion in the object you are viewing (an image jump) when you switch your gaze from one power to the next.

Progressive Addition Lenses (PALs)

Progressive lenses were designed to eliminate the “image jump” that results from the distinct zones in bifocal and trifocal lens design. By providing a smooth progression of many lens powers across the lens, PALs allow for clear vision near, far and every distance in between. Further, similar to natural vision, they just require a slight movement of the eye, rather than the whole head, for you to see through different lens powers. The smooth transition also eliminates the visible lines present on the other lenses which many view as tell-tale signs of age-related vision difficulties.

COVID-19 Update:  Following the directive from the Government of Ontario, Dr. Pachler’s Office will be closed until Monday, April 6th or until further notice as a precaution to help protect our patients, staff members and the community against the spread of COVID-19.  Should you experience an ocular emergency at this time, please request an e-assessment at www.PrismEyeInstitute.com for access or go directly to the nearest hospital emergency care centre.  Appointments that were scheduled between March 20th and April 6th inclusive have been canceled.  Please contact us to reschedule your appointment once the office re-opens.  In the event that the office is closed beyond April 6th, we will send another notice.  We thank you in advance for your understanding in this matter.  Stay Safe and Healthy!

To Contact Us:  Please do so through our web portal (https://www.oakparkoptometrist.com/contact-us/contact-form/), which will be checked daily.

Contact Lens Re-Orders:  Please leave a message through our web portal. All re-orders will be direct shipped to your residence.

Thank and Stay Safe!

Dr. Pachler