Superior PX - Meet your perfect partner. -

Design of Superior PX

Birth of our flagship model in tailor-made lenses

Since the launch in 1997 of the first tailor-made progressive lenses in the world ‘Super P-1,’ Seiko has been further advancing the development of lenses with the aim of “customer specifications” for each and every individual.

In 2013, against a backdrop in which the demand for high-end progressive lenses is increasing, Seiko will launch our flagship model ‘Superior PX,’ which makes full use of the expertise we have built up in progressive lenses.

Superior PX achieves comfortable vision adjusted to various data for each and every customer through the state-of-the-art technology of Seiko. We have pursued the ultimate “customer specifications” for the flagship model of our tailor-made progressive lenses.

Superior PX basic design<Cross Surface Design® (Double-sided Control Design)>

Natural vision with little sensation of swaying or distortion

  • Previous front surface progressive lens
  • Cross Surface Design® (Double-sided Control Design)

The photograph is an image that shows differences in fields of vision

Expansive, bright, clear field of vision

  • Previous front surface progressive lens
  • Cross Surface Design® (Double-sided Control Design)

The photograph is an image that shows differences in fields of vision

Superior PX personalized design

Seiko ldeal balance design

Automatic design of the perfect lens to match the power

Seiko automatically designs the perfect lenses to match the distance power and addition power of each and every customer based on the expertise we have built up in progressive lenses. We have improved the lens performance itself and achieved and even more comfortable vision by not only employing ‘Cross Surface Design®’ (double-sided control design) but also by relieving the problems with each power.

Comparison image

Frame 3D Correction

Aberration correction that takes into account the pantoscopic tilt when wearing, front angle and vertex distance

It is essential to have correction that takes into account the state of wearing glasses when making lenses which better match the customer. In addition to the “pantoscopic tilt when wearing correction” employed in Superior P1, Superior PX performs “front angle correction” and “vertex distance correction,” so advanced 3D aberration correction has become possible.

Specifications of 0-20° are possible for the pantoscopic tilt and front angle, while specifications of 10-20mm are possible for the vertex distance

Comparison image

Professional customization

Reflection of Former Lens Design

If you wish to have comfortable vision close to that of the progressive lenses you have used until now, please select “reflection of former lens design.”
Upon taking into consideration the characteristics of the lenses, we perform minute adjustments to the aberration balance and provide support for the smooth changeover of our customers.

Comparison image

Reflection of Personal Taste

In addition to ‘SEIKO's Best-design Creation System,’ it is possible to make minute adjustments to each of the near, intermediate and far distance fields of vision to match the lifestyle of the customer.
(It is possible to select up to two Reflection of Personal Taste.)

Comparison image

Selectable Base Curves

In addition to the regular curve, it is possible to select 5 curve and 7 curve to match your frames.

Curve Selection


We provide the best inset for the near zone from 51 types to match the individual data of our customers.
It has become possible to set a more accurate inset than ever before by taking into consideration the pantoscopic tilt when wearing, front angle and vertex distance.

We offer automatic design of the best inset from a variety of indivisual data.

Other design

<Cross Surface Design® (Double-sided Control Design)>
An even more natural appearance that is closer to how things look through the naked eye

Improvement to deviations in the actual size of objects when looked at up-close through lenses

Lenses for people with myopia increase the near magnification and lenses for people with hyperopia suppress the near magnification. This means that the appearance of objects is even more natural and closer to that of when seen by the naked eye.

Improvement to deviations in the actual shape of objects when looked at up-close through lenses

Distortions in objects (difference in the aspect ratio) are compensated for when looking at objects through lenses.

The aspect ratio of length and width is the ratio when looking at regular square objects with the near portion of progressive lenses. The closer the number is to '1,' the more the object resembles the real thing.

Reduction in sway and distortion

It is possible to make it less likely to feel sway even when moving your face from left to right by reducing distortion.

↑Introduction of Cross Surface Design®

World’s first, Magnification control

This is a new technology that reduces deviations in the actual size and shape of objects as well as improving vision by controlling the near curve on the front surface of the lens.

Near magnification is increased, objects are closer to their original size and at the same time the aspect ratio is improved by deepening the front surface of the near curve.

By making the front surface near curve shallower than the distance curve, the variation between distance and near magnification is further decreased than the back surface progressive and at the same time, the aspect ratio is improved so reducing sway and distortion.

World’s first, Horizontal Atoric®

This is a new technology that deepens the horizontal curve against the curve in the front surface vertical curve, and so reduces sways and distortions. In the periphery, the curve gradually eases up and the increase in the thickness of the lens is suppressed.

By deepening the curve of the horizontal curve further than the vertical curve, sway and distortion have been reduced, and the aspect ratio has also been improved.

<Aspheric Adjustments according to Dioptric Power>
for comfortable vision for any power

Previous lens

Previous lens

With ordinary progressive lenses, a common semi-finished blank (※) is used at each base curve division, resulting in differences in optical performance.

Semi-finished lens material with shaping on one side completed, leaving the other side to be processed when an order is placed.

Aspheric Adjustments according to Dioptric Power

Aspheric Adjustments according to Dioptric Power

Pursuit PX provides a wider field of vision and comfortable fit to customers needing all kinds of power with no difference in optical performance caused by power.

<Curve Pairing system>
Beautiful appearance and superior optical performance

Curve Pairing system

If there is a big power difference between the left and right lenses, variations may occur in the base curve and this may cause a feeling of discomfort in appearance.
In cases where there is a significant difference between the base curves, the curves of Superior PX are automatically matched to adjust the appearance at the same time as realizing outstanding optical performance.

When curves are matched

<Advanced aspheric design>
Improving the far distance field of vision of those with astigmatism

Advanced aspheric design

Comparison image

Compared to previous lenses, the aberration balance is adjusted and the long-distance field of vision significantly expanded in line with "Listing's Law" that determines the orientation of the eyeball when the field of vision shifts in various directions.

Lens appearance

Beautiful fit in small frames

  • Previous lens
  • Superior PX

The photograph is an image that shows features.

Superior PX are “super-individual-orientated lenses” that can be designed in detail in accordance with the customer’s lifestyle, usage situations and frame shape.
Above all, we have progressive corridor lengths available from the extremely short type of 10mm.
Therefore, it has also become possible to fit these lenses into frames with a shallow top and bottom width, which is something that was difficult to do with conventional progressive lenses.

Thin, lightweight and comfortable to wear

  • Previous lens
  • 1.60 lens
  • 1.67 lens
  • 1.74 lens

This is an image of S-6.00. SEIKO's previous lens used 1.50 monomer.

The numerical value that indicates the ability of the lens material to refract light is called the "refractive index" and the higher this index, the thinner the lens. The Superior PX Series features a lineup of 3 types of material: Ultra-high 1.74 refractive index material, high index 1.67 material and 1.60 index material.
The 1.74 material in particular offers the wearer the chance to experience the comfort of the world's thinnest plastic lens.
In addition, the back surface aspheric design featuring an aspheric surface on the front side of the lens also contributes to achieving a thin lens.
This contributes to both thinness and lightness.
The Superior PX Series offers solutions to problems such as spectacle weight, spectacles sliding down the nose and after traces of nose pads.

Adopted technologies

  • Cross surface design®
  • 3D Spectacle Virtual-reality System
  • Super Clean Coat BR
  • Super Clean Coat
  • Super Durable Coat
  • UV Protect Plus

Thinness / coating

Product Name Thinness UV Cut off Reflection Resistance Contamination Resistance Scratch Resistance Anti-static coating Reducing blue light Blocking UV rays reflected from the back Fogging Resistance
Superior PX 1.74 ★★★★★ 標準 標準 標準 標準 標準 OP 標準 OP
Superior PX 1.67 ★★★★ 標準 標準 標準 標準 標準 OP 標準 OP
Superior PX 1.60 ★★★ 標準 標準 標準 標準 標準 OP 標準 OP

S:Standard specifications OP:Option


Product Name Refractive Index Specific Gravity Abbe Value Progressive Power Corridor (mm) Quality Assurance Mark
Superior PX 1.74 1.74 1.47 33 10 11 12 13 14 15 16 17 18
Superior PX 1.67 1.67 1.36 32 10 11 12 13 14 15 16 17 18
Superior PX 1.60 1.60 1.30 42 10 11 12 13 14 15 16 17 18