Yes, not all frames are doable with Bifocals or Progressive. The lens height of the frame should be at least 30mm. We want to make it easier for you to identify which frame can or can't be done with Bifocal or Progressive by putting a check or cross mark on the item page. If you need more advise, please don't hesitate to contact our Customer Service Department.

A bifocal lens only allows you to have two vision distances (near and far) while progressive lenses give you all your range of vision from distance, intermediate and near in a smooth progression. Most people like the newer technology of the progressive because it allows for more natural vision and cosmetically they look nicer because there is no line. The upside to standard lined bifocals is that the peripheral vision is sometimes better.

Bifocal lenses have two focal powers: distance and near while progressive lenses have all powers; distance, intermediate and near.

Progressive addition lenses feature a continuous, clear field of vision from distance, through the intermediate ranges, to near without the use of annoying bifocal lines. Bifocal lenses use very old technology. Abrupt and awkward changes between distance and near prescriptions are separated by annoying lines that can be frustrating to wear.

We are Proud to now offer Bifocals and Progressive no-line Bifocals! We have several different options available. Please email us for more information or click here!

A progressive lens make a progressive change from distance vision to near vision providing an infinite range of powers in between. An additional advantage of progressive lenses is the lack of a bifocal line.

We are Proud to now offer Bifocals and Progressive no-line Bifocals! We have several different options available. Please email us for more information!

Answer: Ft 28 bifocal- Standard bifocal with the line, has the smallest half moon segment: 28 millimeters across. Ft 35 bifocals- Same as the Ft 28 in shape, but 7 millimeters wider (35 millimeters across). Executive bifocals- The line on this lens goes all the way across the entire width of the lens. This lens has the widest reading area of all the bifocals, but has a ledge in the lens that separates the distance and reading segments.

There are many choices on the market-many styles and brands offer just the right options for each individuals needs. Progressives or lineless bifocals/trifocals are some of the most popular styles of lenses for correcting presbyopia (the need for two corrections-both near and far focus points) since they give the most natural vision and are the most cosmetically appealing.

them for another frame making any price adjustment necessary. please see our terms and condition for further information. Your purchase is guaranteed against manufacturing defect for 12 months from the date of purchase. In this instance please return them to us stating the problem and we will resolve any problem. This does not cover damage from accidents or misuse. If you do damage them or scrath the lenses please email us the details and we will let you the cost of repairing them.

The tests performed are ‘screening’ tests and are different from diagnostic tests. The screen cannot detect all inborn errors of metabolism. The test may fail to identify some babies with these disorders, and some babies may test positive who may not actually have the disorder. Sometimes babies who are born prematurely, who are underweight at birth, or who may have received a blood transfusion can test positive, but not have the disorder.

Progressive" is an political term used loosely to identify activists of the left, favorable to sound and fair economic and social policies, equality of chances, and the defense of personal rights. The European Tribune is broadly progressive, but welcomes all contributors regardless of political self-identification, provided that they be respectful of the mission of this site, provide principled disagreement and don't engage in trollish behavior. (click to see the definition of a troll)

The lens is the part of the eye that helps focus light on the retina. The retina is the eye's light-sensitive layer that sends visual signals to the brain. In a normal eye, light passes through the lens and gets focused on the retina. To help produce a sharp image, the lens must remain clear.

A lens implant (intraocular lens or IOL) is a man-made, clear plastic lens approximately 6 mm in diameter which is placed inside the eye at the time the cataract is removed. It replaces the natural lens and remains permanently within the eye. The lens has small spring-like arms called haptics that prevent the lens from moving out of place.

Yes. Bifocals offer the convenience of distance and reading powers in one lens. You should only order bifocals if your optometrist has recommended them. We use D28 lenses which have a 28mm-wide segment in the lower half of the lens and are positioned 3mm below the lens centre. Please ask your optometrist to write your prescription assuming a distance of 12-13mm from the eye to the lens (back vertex distance).

Variblee rate springs defelct at different amounts per inch. An example would be: 200 lbs. = 1 inch deflection, 600 lbs. = 2 inch deflection, 1000 lbs. = 3 inch deflection, and so on. Varible coils have a soft initial spring rate and a much firmer spring rate to handle more weight, decrease sway, and improve handling.

Research indicates that only a small number of those with drinking problems will experience a progressive decline. An individual's drinking pattern frequently ebbs & flows over time. While "not drinking" may seem an unpleasant choice to someone who is currently a frequent and heavy drinker, research clearly indicates that even those labeled "alcoholic" have periods of normal drinking or even abstinence under the right conditions - if they so choose.