Definitions for "Bifocal"
Related Terms:
Bifocal lenses, Multifocal, Bifocal lens, Trifocal lens, Multifocal lens, Bifocals, Trifocal lenses, Trifocal, Progressive lenses, Progressive lens, Aspheric, Concave lens, Convex lens, Converging lens, Aspheric lens, Aspherical lens, Toric lens, Spherical aberration, Accommodation, Hyperopia, Fish-eye lens, Compound lens, Astigmatism, Lens, Aspherical, Myopia, Dioptre, Diopter, Diopter adjustment, Diverging lens, Hypermetropia, Crystalline lens, Plano, Magnifying glass, Monovision, Fisheye lens, Eye relief, Aberration, Farsightedness, Refractive errors, Emmetropia, Telecentric lens, Back focal length, Wide-angle, Nearsightedness, Nearsighted, Normal lens, Refractive error, Angle of view, Distortion
Having two foci, as some spectacle lenses.
a bifocal lens.
a lens that corrects both near and distant vision by having two parts with different focusing strengths
a lens that is designed with two different prescription areas to correct for both near and distance vision.
Projection lenses with two focal points.
A lens with two refractive powers. Power in the upper portion is for distant vision, and the lower portion is for seeing close objects, e.g. reading.
having two foci; "bifocal eyeglasses"
a lens that has two
a single lens that is divided by a visible line into two viewing areas, each with a different prescription
A type of spectacle or contact lens design that includes two focal areas: one for near, one for distance.
A type of lens which allows the patient to see far distances, as well as close up distances without any interference. Not available in lasik procedures yet. However they are available with contacts and glasses.
a corrective lens which has two focusing distances, near and far.
A spectacle lens with two areas one of which has more dioptric power than the other.
contact lenses with two or more viewing zones
Having one segment for near vision and one segment for far vision.
contains two or more viewing zones allowing for one to see distant, intermediate and near objects.
Bifocal contact lenses have two viewing areas (multifocal lenses have more than two). Part of the lens is for seeing distances and another part is for seeing up close.
A lens with two areas, one of which is more powerful than the other. Usually one area focuses in the distance, the other at the near.
A lens providing both distance and near (reading) correction by mean of a segment having added power or focus.