Generally, progressive glasses are also called the invisible bifocals or no-line multifocal glasses. Progressive glasses are good for all distances - far, intermediate and reading. In progressive lenses you can have clear vision in all distances from far to reading and everything in between using just one pair of glasses.
Progressive lenses gradually increase in power as you see from top to bottom on the lens. The prescription changes little by little across the lens surface, providing a gentle transition. The main difficulty in any lens that gradually increases in power is that vision on either side of a vertical line through the optical center produces unwanted, unprescribed cylindrical power or astigmatism, causing distortion. And that’s why progressive lenses can cause peripheral distortion when moving your eyes from side to side
Modern progressive lenses are made with a smooth transition of the power making sure to reduce the distortions at the maximum. When progressive lenses are made there are few different parameters that are taken into account: frame style and shape based on your face, your lifestyle in addition to your prescription, measurements. To make the modern progressive lenses the manufacturers integrate personalized parameters while making the design calculations, so that they can improve the design to best meet the wearer’s specific needs.
These all in one or no-line multifocal glasses have a learning curve. As there is no line to guide, you need to find the correct portion of the lens or as it’s also called the sweet spot, for the task that you are performing. You need to look through the top portion of the lens while walking and through the bottom of the lens for reading or any close up work that you are doing.
During the learning process of getting used to progressive lenses, you may feel off-balance, or some fishing movements when looking through the lens. While going upstairs or downstairs you may feel that you may miss the stairs or even nauseated from looking through the wrong section of the lens.
If you are wearing progressive glasses for the first time you need some time to get used to your glasses. It may take anywhere between a week to a couple of months to adapt and learn the correct way to look through the lens. Point your nose toward the object you are focusing on and adjust your chin up or down until the object appears clear. If you experience eye strain or headaches, it’s okay to take breaks and remove your glasses, but do keep trying.
To reduce the adjustment time, make sure that you get your lenses customized and fitted by a licensed optician. To order progressive lenses and get it customized by a licensed optician please visit us at nexgenopticals.com or email us at info@nexgenopticals.com
