One focal distance is required for eyes to make adjustments at different focal points.
For prescriptions where either one focal distance is required and the eye can make the full-range adjustments necessary for correct vision at different focal distance.
Advanced technology allows these lenses to gradually change in power from the distance segment to the near vision segment. The specific prescription is ground from a series of custom lens designs and powers.
Progressive lenses provide the full range of focus-from near, to intermediate, to far-gradually, without separations or interruptions. These lenses have no seams or lines to distort or disrupt viewing. They look and feel like single vision lenses.
The gradual decrease in ability of the eye to focus is a natural part of the aging process. Bifocals contain two prescriptions for correcting vision at different distances. Bifocals aid both the near and far vision, with a visual line dividing the two distinct areas of prescription.
Multifocal lenses are designed to correct near and distant vision for presbyopia. Lens segments vary in width and placement to meet specific requirements.
Trifocals are prescribed to aid near, far and middle distance vision. The trifocal lens design has three distinct areas of power to be used, with visible lines dividing the three distinct areas of prescription.
Multifocal lenses are designed to enhance distance, near and mid-range vision. Lens segments vary in width and placement to meet specific requirements.
These lenses have two focal corrections without the noticeable lines. The area that fuses the two powers together is an unusable area.
Smart Seg Flat Top
These lenses change power gradually as the eye moves down through the near segment allowing a range of ten feet. One visible line divides the distant power prescription to the intermediate and near prescription.