varilux lens fitting guide

Step 1—ADJUSTING THE FRAME

• Make sure the frame is properly adjusted on the patient before taking any measurements
• Set the vertex distance between 12 and 14 mm
• Set the pantoscopic tilt angle between 8 and 12 degrees
• Frame should have positive facial wrap.

Step 2—TAKE THE PATIENT’S INTERPUPILLARY DISTANCE (PD)

• Exact alignment of the Varilux lens, beginning with an accurate PD, is a must for far and near vision
• To ensure maximum accuracy, use a Corneal Reflect Pupillometer, which enables you to obtain both binocular and monocular PD in a single procedure
• Use one measurement to verify the other: The monocular PD, when added together, must equal the binocular PD. If not, new measurements should be taken.

Step 3—TAKE FITTING HEIGHT MEASUREMENT

• Accurate vertical positioning is important. In an adjusted frame, a lens positioned too high or too low may limit the field of vision as the eye moves through the different areas
• To deliver uninterrupted flow of changing power and to ensure comfortable near vision, follow the recommended minimum fitting height. If the selected frame does not accommodate this height, edging may remove a valuable portion of the usable reading area
• Take a monocular height measurement by marking each lens at center pupil using a felt-tip pen. Draw a horizontal line on each lens and verify that the lines are crossing the center of each pupil
• If the measurement was taken at the dispensing table, ask the patient to stand and fixate on an object in the distance. Observe the positioning of the horizontal line to be sure it intersects the pupil
• Check the fitting height by measuring from the deepest point of the lens to the pupil center
• Be sure to be at the same level as the patient to avoid parallax error

Step 4—CHECK LENS CUTOUT

• With its progressive changes and soft periphery, Varilux lenses are designed to fit most frames, including today’s popular smaller styles. Of course, it’s still important to double check fit
• Mark the patient's fitting height and PD on the sample lens, creating a cross
• Place the lens cross over layout chart cross to verify that the lens will cut out. If it doesn't fit, choose another, more suitable frame
• An important reminder: To provide comfortable near-vision, it’s neither necessary nor recommended to increase the add powering of a Varilux PAL