Quiz For Progressive and Advanced Design Multifocal Lenses

The Varilux 2 by Silor and the AO UltraVue were introduced in the:

The continuous increase in plus power in a progressive lens is produced by a curve

The removable ink markings on a progressive lens are for the purpose of:  1. lens verification  2. layout  3. identifying the lens manufacturer  4. verifying the add power

The permanent semi-visible markings which are engraved on the lens surface are for the purpose of:  1. lens verification  2. layout  3. identifying the lens manufacturer  4. verifying the add power

The amount of surface astigmatism present in a progressive addition lens is dependent upon:  1. the add power  2. the length of the progressive corridor  3. the width of the distance and near zones  4. the base curve

A hard design progressive lens:  1. positions the astigmatism into a smaller more concentrated area of the lens  2. results in wider distance and near zones  3. spreads the area of distortion over a wider area of the lens  4. results in smaller distance and near zones

A soft design progressive lens:  1. positions the astigmatism into a smaller more concentrated area of the lens  2. results in wider distance and near zones  3. spreads the area of distortion over a wider area of the lens  4. results in smaller distance and near zones

When the design of a progressive lens is modified for each add power to maximize the width of the progressive channel and the reading area, it is called a ___________ design.

A progressive lens design in which the right and left lens is identical is known as:

Modifications of the progressive design as the base curve changes is known as:

______________ refers to how the design handles unwanted power changes that are pushed to either side of the progressive channel and reading area.

During the manufacturing process of ____________________ the computer calculates each component of the prescription to provide the identical correction when the lenses are actually worn.

“Position of Wear,” “Retina Forward Design” and “Zeiss Measurement Value System” are terms that refer to:

Progressive designs that are asymmetric are:

_______________ are among the inherent limitations in progressive lens design.

In selecting progressives for a patient, the best policy its to:

When dispensing progressives which type of frame is preferred:

A short corridor progressive should be recommended when:

To minimize progressive lens refits:  1. when measuring vertical height anticipate frame slippage  2. verify the lens on the patient  3. demonstrate power changes in the periphery  4. use positive words

A progressive lens is considered “short corridor” when its recommended minimum fitting height is ______ mm and below.

Short corridor lens designs need to be especially precise because:  1. there is less material to work with  2. there is less margin for error  3. they are a scaled down version of standard PALs  4. they are available in CR 39 only

Aspheric and atoric designs are often incorporated into short corridor designs in order to:  1. reduce weight and thickness  2. create a smoother transition between zones  3. facilitate prism thinning  4. minimize edge thickness

When the progressive curves are positioned on the back surface of the lens:

Short corridor lenses are generally recommended when the B measurement is less than ____ mm.

Some short corridor lenses can be fit as high as ____ mm.

When fitting short corridor lenses it’s best to:

The best way to gather the required patient information is:

Explaining how progressive lenses do their work is important for:

The best procedure in dispensing progressives is:

When troubleshooting progressive lenses you notice the patient moves the reading material off to one side for a better focus. This would indicate:

Upon what process are wave-front progressive lenses based?

Which of these would not be considered biometric data?

What can change the effective diopter of the lens?

In general, a larger vertex distance may:

Which of these is not a short corridor PAL?

What must an ECP always do before verifying a PAL?

Which of these could be a reason the patient describes a PAL as “unusable”?

What would be a positive word when explaining adapation to a patient?

What is image swim?

What will lenses designed to balance right and left vision do for a patient?