Eye conditions, like everything else, will vary from individual to individual as they age. We won’t all be subject to glaucoma or macular degeneration but we will all experience decreased flexibility of the lenses. Decreased flexibility means that the eye loses it ability to focus on nearby objects. This explains why so many people over the age of 45 have succumbed to reading glasses, bifocals, or progressive lens glasses.
You may have noticed by now that lenses that combine reading and distance prescriptions require you to tilt your head so that you are looking through the precise area where you need the most clarity. I was first introduced to bifocals when I was eight in an effort to retard my rapidly progressing near- sightedness. I didn’t like them then and I don’t like them now. I had all sorts of trouble with stair steps and curbs and even today I complain because I can’t read or watch television from a recliner or my bed
Laura Johannes wrote an article for The Wall Street Journal (March 16, 2010) about a “bridge for the bifocal set” that sounded interesting to be. A new type of eyeglass called TruFocals (Zoom Focus Eyewear LLC) has been designed so that you can manually focus the lens. The glasses are made up of two lenses (normal distance prescription on the outside and a flexible plastic lens containing fluid behind it). It all sounds rather complicated but when the slider is moved to the left, the reading magnification is off and distance vision is on, as it is moved to the right the reading magnification increases.
Optometrists, according to the author, give them high reviews but the drawback is that they come in Harry Potter-like frames. It is ideal solution for home use but if you are looking for a fashion statement this won’t be for you. However, we know that design stylists won’t be far behind.
The adjustability is useful for computer work because you won’t need to bend your head to line up your sweet spot. These lenses are safer. If you have ever had trouble with stair steps or curbs because of your bifocals you will understand what I mean. Making the adjustments is a little hard to get used to but an experiences user can soon figure out how to do it with one hand.
A more fashion conscious version by PixelOptics Inc. is due out next year with a larger choice of frames. The newer version will be more like regular progressives but with a switch to make adjustments easier. I already think that glasses were the best invention ever and I am doubly pleased that researchers are still working on ways to make life more comfortable for us.