How do bifocals work?
Rather than having two pairs of single-vision glasses, bifocal lenses can be a more convenient solution as they combine all your vision needs into one pair of glasses.
Bifocal lenses are typically worn by people over the age of 40-45 who need additional help with their near vision due to the effects of presbyopia where the crystalline lens inside the eye naturally begins to lose its ability to focus on near objects.
For example, if you work in an office you may want to have bifocal reading glasses, so you can have distance vision in the top of the lens for meetings or presentations, and near vision in the segment for looking at your computer screen or at documents.
What is the difference between varifocals and bifocals?
Bifocals have two lens powers – one for distance and one for up close. Varifocal lenses have a blended transition of power between distance and near vision which allows for an easier movement between distance, intermediate and close vision.
Varifocal lenses don’t have visible lines on the lenses so look just like regular lenses. Your optician will be able to recommend the best lens to suit your needs.
Do bifocals lenses work for presbyopia?
Yes - they work for presbyopia. Bifocal lenses combine two prescriptions into a single pair of glasses. The top part of the lens corrects distance vision, and the lower part corrects vision for close-up focusing. So there’s no need for additional reading glasses.