If you donвЂ™t need it, but you take it anyway, If you need it, and itвЂ™s the right med at the right dose, then it brings your BP down appropriately. ItвЂ™s called fusion (the eyes and brain working together to fuse the images from two eyes into one and create depth perception) and weвЂ™re talking about fusional amplitudes.Д«ut that doesnвЂ™t mean that thereвЂ™s no effect of prism on how youвЂ™re seeing or how your eyes are working together just because you arenвЂ™t seeing double.

Most of us have the ability to accommodate a certain amount of unnecessary prism before we would actually see double. If prism corrects double vision, including that which may accidentally be introduced by the prescription, then if it was accidentally created, wouldnвЂ™t that show up as double vision? If you look at my prescription, the Add is opposite sign to the Sphere and Cylinder, which I think means that my distance glasses will be worse than nothing for reading. It doesnвЂ™t have the astigmatism correction, but it is a lot better than looking through the distance portion of my glasses. When I switch to single distance prescription, if I keep this height I will still be able to look out under the bottom of the lenses as a sort of el cheapo bifocal. Oh, interesting benefit I have discovered with the shorter (30mm) height of lenses I have now. I will check out the lay of the land on progressives next year. Depending on how little you value your time, you might want to take a peek at those forums. Probably no surprise, but there are lens geek sites where people discuss the pluses and minuses or all of the lens brands out there.

My two current pairs have the Shamir Autograph Intelligence lenses and I think these are the best IвЂ™ve ever owned. Their touted digital progressives may be better than the cheapest of the cheap options, but I sure didnвЂ™t like them. I tried them again recently and found them not as bad, but I stick with the bifocals. As I looked around, that actually made me woozy. I did get progressives as well but I didnвЂ™t like the barrel distortion at the edges, which reminds me of ultrawide lenses that bow the lines, making | | look like ( ). If IвЂ™m in a situation requiring a mix of uses, IвЂ™ll wear my bifocals. However, cheap вЂњcheatersвЂќ work pretty well too. Working on computer or close by, I have prescription readers. Until recently we owned a campervan, so stopping 11,000 lbs of machine made me nervy-ous, requiring more time to stop etc. If itвЂ™s during the day, I have single visions that are sunglasses. HoweverвЂ¦Дriving in strange places at night, when I need to be able to read signs quickly, I use single-vision. In Olden Days in the office, I would use these if I was in a meeting room and need to see my laptop and the board/projector at the same time. bifocal with the top 1/3 distance and the bottom 2/3 intermediate.I typically put these on at my desk and wear them for the working day indoors single-vision intermediate for computer work.I find these impossible to use on the computer as the intermediate corridor is too small.

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