High Performance, High Wrap, Sports Prescription Sunwear
Introducing Oakley True Digital
By Mark Mattison-Shupnick, ABOM
Release Date: March 1, 2011
Expiration Date: February 14, 2013
Mark Mattison-Shupnick, ABOM is currently director of education for Jobson Medical Information LLC, has more than 40 years of experience as an optician, was senior staff member of SOLA International and is a frequent lecturer and trainer.
Upon completion of this program, the
participant should be able to:
- Define the issues that athletes and
sports enthusiasts encounter when
obtaining wrap prescription sunwear.
- Understand the new technology of
Oakley True Digital.
- Learn how optimized free-form lenses
are better than traditional lenses for
wrap frames, in Rxs for single vision or
This course is approved for one (1) hour of CE credit by the American Board of Opticianry (ABO). Course STWJM502-2
This course is supported by an Educational Grant from OAKLEY
An athlete puts formidable demands on
sunwear. In fact, sunwear must become part
of the athlete and an extension of the athlete’s abilities and capability. Their sunwear
must deliver acute vision in all directions;
add comfort and fit great, all while protecting the athlete’s eyes from the outside world.
These demands push sunwear innovation in
a direction that benefits everyone, not just
those who compete in sports.
Oakley True Digital is a new free-form
solution for high performance, high wrap
prescription sunwear. Using proprietary
techniques, it combines the knowledge of
actual frame shape and fitting demands to
reconstruct the central prescription. It also
utilizes Oakley Dual-Peripheral Technology to ensure sharper peripheral imaging
and motion detection.
GOOD NEWS, BAD NEWS
Prescription wrap frame design can erase
the line between form and function by combining physics and art. The wrong frame in
size and shape, or a design form that is too
flat gets in an athlete’s way or offers too little
lens or coverage. Instead of helping, it
reduces performance, adds effort and robs
the athlete of that critical burst of energy to
score that goal. Sunglass wearers need lenses
and frames that provide the best coverage of
the eye and the area around it. Therefore,
larger lenses and wrap frames better meet
the sunglass wearer’s needs.
It’s the shape of high wrap, high performance sunwear that makes them so great.
They provide great protection from wind,
dust and debris while delivering an unobstructed field of view, with style and attitude. After all, the best of athletes will use
their looks and presence as part of the
package that defeats an opponent.
The bad news has typically been the difficulty of getting a prescription that works,
into the frame. Every Rx needs to be the
same shape as the frame, typically an 8
base—and that may be unusual. Wrap
lenses fit patients at extreme angles and
that makes the patient’s vision uncomfortable or unwearable. Lastly, the shape of the
edge or bevel needs to be different for prescription lenses to fit snug in the frame.
What’s an optician to do?
The companies that invented wrap sunwear understand them best. They consider
the intended lens fit and shape i.e., wrap
angle, tilt angle, frame curve and lens curve
(Figure 1). Using the CAD drawings and
actual frame measurements, the details of
frame, lens position and fit can be included. Using free-form surfacing, an Oakley
True Digital lens design can be created to
correct both central and peripheral vision,
especially in an 8 base lens. Then multiaxis digital edging prepares a customized
bevel; drills holes or notches the lens. This
delivers the right vision, cosmetics and
edge for a better pair of high performance
sunglasses for the athlete or anyone outdoors.
What if you edge your own work? The
author works part-time as an optician and
does his own bench work. In the past, that
included wrap frames. However, with the
edging challenges created by new wrap
designs (step and fluted bevels), the
improvement to specialty edging (multiaxis edgers) and advantages of free-formed
designs, it’s an advantage to send the jobs
directly to an “authentic” lab for processing. What are the components of an
Oakley True Digital wrap Rx solution?
THE REQUIRED COMPONENTS
Once the patient has chosen the right
frame for style and attitude, confirm a close
fit to the face with good overall coverage
for the eye and surrounding area.
Next, take monocular PDs and if progressive, monocular fitting heights. Consider fitting height for the sport for which
the lenses will be worn. For example, the
author is a cyclist (road bike) and presbyope (+2.50 add). The fitting height
required is different (higher) for “on the
bike” versus walking around. Discuss with
the patient whether measurements should
be for “on the bike” or not. Sometimes
having the athlete bring their bike to the
office gets the best measurements.
Next confirm that the Rx is within available range, choose the right filter color,
polarized lens, and mirror and AR combination, and place the order. That’s it. In an
“authentic” program, the company takes
care of the rest. Since the frame dimensions are known, no frame measurements
are needed, including wrap angle and tilt.
The fact that the lab knows the frame
dimensions exactly and can create the correct free-form design means that there are
fewer risks to dispensing wrap eyewear.
That’s an important difference. This reduces the number of variables for the dispenser and therefore, reduces the risk to order them. It means increased business opportunities with results that are convenient
OAKLEY TRUE DIGITAL
Oakley True Digital considers the patient’s
prescription, lens material, lens base curve
required, frame shape, tilt and wrap angle
to optimize the lens’ prescription to
expand the clear view in all directions.
Using free-form techniques, prescriptions
are uniquely digitized and cut for high
wrap frames. For the athlete and sports
enthusiast who demands the best vision, it
provides continuously clear vision from
lens center through mid and far periphery,
both nasally and temporally.
AT LENS CENTER
In wrap frames, flatter, ordinary lenses create double vision and blur, typically distort
the frame and can make the eyewear
unwearable. Instead, Oakley True Digital
starts with the correct base curve for frame
curvature. Since the actual prescription,
when tilted and wrapped at extreme angles
adds prism and changes lens power, the lens
power is reconstructed to deliver the correct
prescription in the way that the lens will be
worn. This is in fact, the only way to actually
deliver the prescription as the doctor prescribed it—anything else changes the effective power and binocularity of the eyewear.
Wrapping lenses creates prism (typically
Base Out) in both plano lenses and in prescriptions. The loss of comfortable binocularity is the primary reason that patients
might have rejected the wrap prescriptions
that you’ve tried. Adding the correct compensating and opposite prism to the Rx
neutralizes any induced prism from a high
wrap angle, thus eliminating double vision.
The wrap angle also changes the lens’
effective power so the prescription delivered is altered to become the Rx as prescribed in the “as-worn” position. This
delivers the vision exactly as was prescribed by the doctor.
In the example (Figure 3), an Rx of -0.25 -2.25 x 90 would be measured on a lensmeter as -0.16-2.17 x 89, 0.24 BI. But when
it’s at a 25 degree wrap angle, (the angle of
the lens in the frame used), it would deliver
the Rx that was actually prescribed, without prism. For the wearer, no change to the
actual prescription is taking place and dispensers can rest assured that there is no
“change to the prescription.”
For example, a skier must have excellent
binocularity and depth perception to judge
distance and predict the terrain through a
series of moguls. Without a prism corrected
Rx, that would not be possible. The results
are great looks and excellent acuity, binocularity and comfort.
The increased angles of view and the
shape of wrap lenses require a peripheral
lens design that is also different from standard lenses. There are peripheral base
curve, eye angle of view and centration
effects, so a digitized redesign of the periphery makes sense, especially for the athlete
with high performance requirements.
NEW, OAKLEY DUALPERIPHERAL TECHNOLOGY
Oakley Dual Peripheral Technology is
designed to ensure improved peripheral
image and motion detection. Using freeform techniques, the Oakley laboratory
balances the mid-peripheral prismatic
effects for binocularity and reduces the
blur in the far periphery to best detect
Peripheral powers and prism change as the
eye rotates behind the lens. Optimizing the
binocular effects i.e., off axis prism imbalance
for the frame chosen ensures a balanced
view. Figure 4 illustrates the binocular,
unwanted horizontal prism in a -3.00D
prescription OU. This shows that unwanted prism is limited to about 0.25 for the
area of mid-periphery. This provides for
wider fields of clear view.
In an evolutionary way, prehistoric man had
to know when a predator was lurking in the
shadows, just out of the field of view. As a
result, the visual system evolved to make the
periphery of the retina extremely sensitive to
small amounts of changing light and the
ability to turn the eye to confirm a threat.
It’s the same for the modern athlete. For a
cyclist, competitors in the far periphery
about to make a break from the peloton,
must be “seen” as soon as possible to ensure
that a like reaction occurs if necessary. So,
the best far peripheral clarity would be beneficial. Clarity of motion detection would be
improved if blur (astigmatism and power
error) and distortion are corrected at the
angles of the far periphery.
Figure 5 illustrates the cylinder and
power error of an 8 base, high plus lens
(upper) versus the same lens done as an
Oakley True Digital (lower). Using the
ellipse as a suggested frame shape, it can be
seen that there is significantly more blur for
the spherical lens. The Oakley True Digital
lens is significantly less blurred for
improved far peripheral vision.
By reducing the errors at these angles and
reweighting the way that the periphery
affects vision, both eyes can provide the
right three-dimensional spatial cues.
Therefore, more than just the axial-wrapcompensations are required when thinking
about lenses that work for the athlete. Lenses that correct the periphery can outperform an ordinary 8 base added to wrap
frames. These lenses can provide a better
recognition of peripheral objects and movement, and when combined with sports
training, practice and experience, wearers
can improve sports performance.
Lastly, for better lens cosmetics, lenses
are manufactured with a thickness reduction prism. This insures that lens thickness
at the frame top and bottom is the same.
This has been a typical improvement in
progressives in standard lenses, now used
also for wrap eyewear.
Wrap frames also place special demand on
edging. The extreme angles at the lens
periphery as well as the position of the
nose pad may get in the way of the lens
edge; standard bevels do not work. For
mid to high minus and plus prescriptions,
lens thickness requires steeper bevels and
the rear lens wall must be angled correctly
to avoid the frame behind the bezel.
One solution for plastic wrap frames was
to place the bevel at the back of the lens. This results in the lens protruding from
frame front, changing the angle of the lens
and the effect of the Rx. More importantly,
it changes the way the patient receives their
new glasses; differently from the way they
expected their eyewear to look. For the
newer step bevel and fluted lens designs,
specialty-edging systems are required.
PUTTING IT ALL TOGETHER
Oakley True Digital and Oakley Dual
Peripheral Technology capitalize on a proprietary Oakley frame database to accurately deliver the right digital lens designs
in a patient’s prescription. Reconstructing
the central Rx and redesigning the periphery
for the frame chosen for the way that the
frame fits, provide an optimized solution in
high performance, high wrap sunwear.
There are few risks in dispensing an
authentic product since the hard issues of
frame measurements are known. Two prescriptions are returned to the optician so
that lens verification of the reconstructed Rx
is easy. Verify the Rx using the reconstructed
Rx supplied by the laboratory. Be sure to
include the prism. At the compensating
prism, dot the PD at the prism values shown
and verify the PD. With the prism the PD
will be the same as the patient’s.
Oakley True Digital reconstructs the central
prescription for the best vision for any wrap
angle. Oakley Dual Peripheral Technology
ensures sharper peripheral imaging and
motion detection, critical for the split second
decisions of any athlete. The result is a high
wrap prescription sunglass that delivers more
than crisp acuity; but a clear periphery and
the fluidity of vision across the lens to best
meet anything the sport throws at you.
Make authentic wrap prescription sunwear
an integral part of every lens solution for any
athlete or sports enthusiast that visits your
office. Oakley True Digital is a benefit for
not only the sports-minded but any patient
looking for the best possible optics.