Freedom 5 Progressive Lenses

Design Concept
The Freedom 5™ progressive lens by X-CEL Optical is designed to incorporate all new "state-of-the-art" features. Freedom 5 takes the uncertainty out of patient acceptance, dispensing, prescription manufacturing, and finishing. In short, the design sophistication of the Freedom 5 progressive lens makes everything else simple.

Aspheric
Aspheric geometries have created the basis for optimum acuity in all vision areas of the progressive lens. Aspherics give a cosmetically thin appearance to the finished lens.

Asymmetric
The lens design differs from right to left eye, balancing vision in the far-distance area.

Decentered
The optical center of the lens is decentered 2.5mm in each eye to provide greater "cut-out" space, accommodating larger frames.

Multi-Design
The design parameters differ slightly for each add power, optimizing visual acuity.

Broad Reading Zone
A wide, distortion free near-vision area. Full add power is reached 17mm below the centering cross.

Wide Intermediate
One of the widest intermediate corridors of all known progressives.

Prism Thinning
The lens is designed to permit prism thinning which reduces the overall weight and thickness of plus power lenses.

"Soft" Design
Advanced lens design techniques eliminate "hot" distortion areas in and around common vision areas. Freedom 5 lenses are proven outstanding in patient adaptation, acceptance, and easy fitting.

Lens Marking
Lenses are ink-marked with a horizontal line broken by three dots and marked with an (R) or (L). This is the horizontal axis of the lens. The fitting (centering) cross is located 2mm above the horizontal axis line, and 2.5mm in from geometric center. The area immediately above the fitting cross is the distance power measuring area.

The near power measuring area is defined by and "ink-marked", 10mm circle located 13mm below, and 2.5mm in, from the fitting cross. This is the near "reading" zone.

Two "semi-visible" diamonds are engraved coincident with the lateral ink-marked dots on the horizontal axis, and the lens "add power" is engraved on the temporal side of the lens.

Blocking, Surfacing and Finishing
The yellow 'ink-marked" dot (optical center), located 2mm below the fitting cross must be in the exact center of the blocker in order to achieve complete control of the thickness reduction prism. Use the largest block and blocking ring available for maximum lens support. Use of smaller block may result in waves when surfacing plastic lenses.

When blocking, the upper (distance) portion of the lens must be in full contact with the blocker to avoid unwanted prism. Apply pressure to the distance (top) portion of the lens while blocking.

Use a protective spray or tape on the lens. To maintain the inked markings, cover with thin transparent paper or film prior to spray or tape application.

Make sure to use the same prism value for both right and left eyes. Consider lens axis and cylinder when selecting prism value.

Before edging, make sure the horizontal line is oriented horizontally. When centering the edger, calculate the decentration required to provide for the pupillary distances and height of the fitting cross. A tolerance of 0.5 is permissible.

Fitting
Frame Selection 
Be sure to select a frame so that the pupil is at least 22mm above the bottom of the frame, thus ensuring maximum utilization of the near-vision area. The closer the lens-back vertex is to the cornea, the greater the field of vision in the progressive and near-vision area. The frame should have a greater than usual pantoscopic tilt (9º - 12º ). Frame size and pantoscopic tilt are very important considerations for satisfactory fitting.

Pupil Center Measurement
Vertical and horizontal pupil position should be measured separately for each eye (monocular measurements). A corneal Reflection Pupilometer is preferred for accurate measurements. Other standard methods for precisely defining pupil position are acceptable. Avoid parallax.

If a Pupil Position Gauge is used, first make sure the frame has been properly fit on the patient. Place the gauge so that the peripheral lines coincide with the base and nasal edge of the frame. Using a felt pen, mark the position of the pupil on the gauge. Record the measurements from the gauge for each eye.

If you choose to mark pupil center on frame trial lenses, you may use the Freedom 5 Centration Chart to determine vertical and horizontal pupil position. For each eye, position the mark directly on the centering cross on the chart. Then read fitting height at the lowest point of the frame bevel.

Note: For normal use, the fitting cross should be located directly at the central of the pupil. If the lenses are for the first time user of mainly long distance viewing (e.g.. by driver) the cross may be located up to 2mm below the pupil, at the dispenser's discretion. It is often worthwhile to double-check for propose pupil positioning. Have the patient remove, and then replace trial frames and lenses if used. Observe the patients head position in different vision-posture, e.g.. standing, reading, ect.

Check frame Selection
Check the frame size to make sure that is not too large for the lenses. Do this after marking the pupil position. Place the frame on the Centration Chart so that the pupil position coincides exactly with the fitting cross on the lens diagram. Do this separately for each eye. Make certain the frame fits within the lens diameter.

Restoring the Ink-marks
The manufacturer applied ink-marks may be restored by using a template. Align the right or left template (different for each eye) so it is centered over the two lateral semi-visible, diamond markings on the lens. Mark with ink or felt tip pen, and identify right or left eye.

Available in 4 materials and 19 colors

High-X 1.55 Clear

*Please note that the Freedom 5 glass progressives are being phased out and being replaced by the Freedom ID glass progressive. The Freedom ID will be available in all of the same colors except fixed tint Gray 3 glass and Clear 1.6 clear glass.

Availabilities

High-X Clear 1.55 index
75mm Blank, 80mm effective area (Decentered)
Blocks 99%, total UV at 380nm. Abbe value 38.0. Tintable & Hard Coated

Base Curve	True Curve	Sag. 50mm	C.T.	E.T.	Back Curve	Add-Powers in 0.25 diopter steps	Rx Range
1.50	1.62	0.957	12.5	18.0	-6.33	+1.00 to +3.50	-8.00 to -5.25
3.25	3.31	1.964	9.6	13.6	-6.33	+1.00 to +3.50	-5.00 to -2.50
5.25	5.30	3.175	12.6	13.6	-6.33	+1.00 to +3.50, +4.00	-2.25 to +2.25
7.25	7.27	4.421	10.6	8.6	-6.33	+1.00 to +3.50	+2.25 to +4.00
9.50	9.69	6.048	15.3	8.6	-6.33	+1.00 to +3.50	+4.25 to +7.50

 

Thickness Reduction (Prism Thinning)

Thickness and weight may be reduced by prismatic thinning (base down prism), thus reducing the difference in thickness between the upper and lower portion of the lens. (see table)

Prism Diopters or thickness Reduction
 

	5 Base	5 Base	5 Base	5 Base	7 Base	7 Base	7 Base	7 Base
Add Power	-2.00	-1.00	1.00	2.00	3.00	4.00	5.00	6.00
100	.00	.00	.25	.50	1.00	1.00	1.25	1.25
125	.00	.00	.25	.50	1.00	1.00	1.25	1.25
150	.00	.25	.50	.75	1.25	1.25	1.50	1.50
175	.25	.50	.75	1.00	1.25	1.25	1.50	1.50
200	.50	.75	1.00	1.25	1.50	1.50	1.75	1.75
225	.75	1.00	1.25	1.50	1.50	1.75	2.00	2.00
250	1.00	1.25	1.50	1.75	1.75	1.75	2.00	2.25
275	1.25	1.50	1.75	2.00	1.75	2.00	2.25	2.50
300	1.50	1.75	2.00	2.00	2.00	2.25	2.50	2.50