Phil Coker from LaHaye Total Eye Care tells us about the difference between line and no-line bifocals.
Line and No Line Bifocals - What's the Difference? Video Statistics
Line and No Line Bifocals - What's the Difference? Reviews
still not understanding why progressives have this out of focus at the sides? Why cant they just be made to change power gradually all the way down the lens?
In this video, a ‘no-line bifocal’ is referring to a multi-focal or progressive lens. As you stated, progressive lenses alter peripheral vison. I would like to know if it’s possible to have a ‘real’ no-line bifocal. One where, there are only two vision corrections (upper for distance, lower for reading), with no alteration of peripheral vision, but with *no line*. I do not understand why this does not exist (if it does not). The idea is that there is near ‘instant’ transition and in the vertical axis only. Is it not possible to have both a half-height reading power lens (bottom half) and a half-height distance power lens (top half) fused together to form a single full-height lens with no line? If the powers of both are small (ex., +1.50 reading /–1.25 distance), could this not be possible, since the difference in thickness of the glass would not be that great?
No line biocal is progressive??
Exclusive Promo! Payoneer is an online payment platform that lets you transfer money from any corner of the world! Sign Up an Earn $25 for free by joining Payoneer click here!
Start mining cryptocurrency right now, for free. Honeyminer makes mining and earning money simple for anyone with a computer. Start Earning Now!
Fame usually comes to those who are thinking about something else.
Oxygen requires Chuck Norris to live