Single Vision - One Lens for one function
Buying a pair of glasses can be a daunting experience. There are so many styles of frame to choose from and all too often little consideration is given to the lenses. Remember when buying new glasses, your choice of lens can have a major impact on your quality of vision and the overall look of your glasses. Here we explain some of the different lens options available.
Single vision means that you have a prescription in your glasses that is correcting for one distance, for example, for reading or long distance.
For many this is all that is required until over 40 years old when age plays a part in the eyes depth of focus abilities. These lenses can then have limitations, as sometimes more than one pair of glasses is needed.
This could cause difficulties, an example of such would be having just a set of reading lenses in a lecture or meeting environment. This is when a bifocal, varifocal or occupational lens may be considered.
The picture shows a single vision distance lens as may be experienced by someone over the age of 40 years old. Notice how the closer detail on the mobile phone is out of focus.