Last Friday, after work, I returned to the vision center, ostensibly to have my eyes measured for bifocals. In the time between making the appointment Thursday morning, and arriving there Friday afternoon, I had changed my mind – I wanted trifocals instead. When I spoke to the technician on the phone Thursday morning, I complained [...]
Tag Archive 'progressives'
Narrow Corridor
Posted in health on Feb 7th, 2008
As the image to the right shows, the layout of the different focal areas on a progressive lens introduce some interesting geometry into the lenses structure. In an effort to produce a lens that mimics natural, un-corrected vision, without lines, the optimal corridor of vision can be rather small. Not to mention the size of [...]