Originally Posted by KeepItSimpleStupid
If you do a little more research, you will find that "computer glasses" can be single vision, bifocal and/or trifocal. With "computer glasses", it's the placement of the bifocal or trifocal that's different as well as the focal point. It's not mandatory that they are single vision.
Looking up + looking at monitor is a bi-focal
Looking down at keyboard + looking straight at monitor + looking up is a tri-focal.
Looking straight/looking down + looking up is a bifocal.
Looking at a monitor without caring much about keyboard or distance is a single vision lens.
Reading poses a different set of constraints.
I was a trip for the optician. No question about it. Most people don't come in with the knowledge I had. I was comfortable with him. He sold me the first set of frames, but allowed me to get the second and third elsewhere for $90 vs. $140 for his price. I had a vision plan that I used for him and other methods to get the steep discount, but I could not get the steep discount at his office because he didn't accept the other discount.
I was the first person that he created the high bi-focal for and he understood why.
What we are looking for is a set of polorized lenses with the best transmission. I just want the benefits of polorization while driving at night without the loss of intensity.
Any ideas?
FYI: I also measured PD and NPD with my digital camera and I was on the money when compared with his pupilometer. The experiment was interesting.
PS: The reason why you don't get sunburn on your face in the car is that the windshield is made from safety glass which has a layer of plastic in the center.