Different from single vision lenses, which have only one, consistent focal to correct a single vision condition, progressive has multifocal. This means that progressive lenses provide a full range of vision correction, which include near, intermediate, and distance without a visible line separating them. Progressive lenses are also called progressive addition lenses (PAL), varifocal or multifocal lenses.
It provides a more natural correction of presbyopia than bifocal or trifocal prescription eyeglasses. Please note that you need to provide us your ADD value when you order progressive lenses. When you are wearing your first pair of progressive lenses, you may need a short adaptation period to become fully comfortable. This might take a few hours or a couple of days.
Free-Form Progressive lenses are also called digital progressive lenses. They are made from computer-controlled surfacing equipment and top technology software for the highest precision.
Free-Form technology is very popular and allows you to obtain better vision and wider visual field.
Single Vision
Single vision lenses are prescribed to create only one field of vision: everything, computer or reading vision. This means that the amount of vision correction is the same within the entire lens.
