In the last year of my forties, I have noted a bit of eye strain after spending one day per week staring at a computer and looking at paperwork. It crossed my mind that I have a pair of single vision prescription reading glasses I enjoy using from my nightstand for prolonged reading, I figured a computer bifocal with a large wide computer prescription up top and a reading segment down under might be a nice tool for "Desk Day".
I have not been so visually annoyed.
The prescription is current, the focal lengths and working distances are measured and calibrated for the task. Bifocals, it turns out, are just a bad way for me to wear glasses.
Issue number one: The large wide computer prescription up top, as in the computer monitor viewing lens, is fine. But, and in the largest sense of the word, there is a very large, 28 millimeter to be exact, blurry floater in my inferior field of view. The issue is, it will not go away, ever.
Issue number two is about the line. I had always heard and probably even calculated for National Board exams how much an image would jump when gazing from one lens to the other across a bifocal segment line. I visualize no such jump. What I do see is a large horizontal blur all of the time. At 40 centimeters that blur occupies two lines of print. At my feet, like where a golf ball or sidewalk curb might be, it occupies some 10 centimeters and at optical infinity it takes up a good 25 centimeters. Yes, ten inches of my vision is obscured by a blurry line. Whatever!
Thank you so much for your time, I am off to order lined trifocals to wear all of the time now, NOT!
Good Day,
Dr. Greg
