bifocal

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Related to bifocal glasses: trifocal glasses

bifocal

1. Optics having two different focuses
2. relating to a compound lens permitting near and distant vision
References in periodicals archive ?
Yet the whole thing felt like I was wearing bifocal glasses. I watched them, but I was also seeing the Hebrew text of the famous Jewish high holiday prayer that ponders the eternal question: "Who shall live, and who shall die" in the year ahead?
He also found time to invent the lightening rod and bifocal glasses.
People who wear bifocal glasses know all about how the distorted view they get when looking downwards at the ground.
The lens is not useful for those who use bifocal glasses.
He also invented bifocal glasses, the odometer and a wood-burning stove that Americans would use for the next 200 years.
Rather than use a magnifying loop that can play tricks with perspective, she wears drugstore reading glasses on top of her prescription bifocal glasses.
Janet Vranish from Taylor, WI asked a question regarding using bifocal glasses and having problems focusing through her peep.