The First Back surface Progressive 世界初！内面累進多焦点レンズ SEIKO P-1SY Back surface PAL December 2006

2 Line Up of SEIKO PAL 累進多焦点 P-1 SY 1.74 : Back surface PAL 内面累進 P-1 SY 1.67 : Back surface PAL 内面累進 P-1 SY 1.60 : Back surface PAL 内面累進 P-1 W 1.67 ： Standard PAL 標準外面累進 P-1 W 1.56 : Standard PAL 標準外面累進 SSVP-1G （ 1.67 ）

3 SEIKO P-1 SY （ Synergy) The first “Back surface progressive additional lens” in the world harmonize the PAL(=progressive additional lens) surface and TC surface (now with aspheric design as well) Adopting all the technologies of SEIKO PAL design 世界初の内面累進多焦点レンズ 1) MDA method : Multi Divided Aspheric 2) VPC method: Vertical Prism Control 3) All aspheric surface on back side

4 Nowadays, back TC is global standard 内面 TC が世界標準 From front TC to back TC Front TC Back TC

5 Back surface PAL as next global standard ！ 内面累進を世界標準へ From front PAL to back (surface) PAL PAL surface ＋ TC surface PAL surface Low based spherical surface TC surface

6 Curve compositions of PAL lenses Front side PAL Back surface PAL 5 curve 7 curve 5 curve 3 curve

7 Why a distortion occurs in PAL lenses? Ｓ. Ｍ. ＝Ｍ Ｓ × Ｍ Ｐ Ｓ. Ｍ.(Spectacle Magnification) Ｍ Ｐ ＝ Power factor １ １－Ｌ・Ｐ ＝ Ｍ Ｓ ＝ Shape factor ＝ １ １－ ・Ｄ １ ｔ ｎｔ ｎ PAL 1) The view size in Lens change vision Single visionBi-FocalTri- Focal 2) How to fix the view size L : Distance Behind Lens P : Lens Power T : Thickness N : index D 1 ： Front curve

8 Mechanism of Front side PAL （ Ｓ. Ｍ. ）＝ （ Ｍ Ｓ ） × （ Ｍ Ｐ ） Front PAL 外面累進 Power arranged by front curve Magnification change Variation of front curveVariation of power Effect of 2 factors

9 Mechanism of Back surface PAL Back surface PAL 内面累進 （ Ｓ. Ｍ. ）＝ （ Ｍ Ｓ ） × （ Ｍ Ｐ ） Control power on Back side Magnification Change Variation of Front curve Variation of power Only 1 effect

10 Comparison between the PAL designs Front side PAL Back surface PAL Back surface PAL + Back surface AS Clear Vision 20 % wider Distortion 30 % less Clear Vision 30 % Wider Distortion 40 % Less

11 Squared project View images of Back surface PAL 1 Base curve is different between vertical direction & horizontal direction. Distortion becomes larger Image distortion is only occurred along horizontal direction and still smaller Front side PAL Back surface PAL

12 View images of Back surface PAL 2 Conventional front side PAL 外面累進 Back surface PAL 内面累進 Far Area Near Area 遠用視 近用視

13 Wide view area of Back surface PAL Front side PAL design Back surface PAL Back surface PAL design WIDE

14 Near view images of Back surface PAL Back surface PAL （ Blue ） Front side PAL （ Green ）

Sway and distortion has been improved by as many as 2 ranks, if ADD is over 2.00D Back surface PAL Front side PAL 2% 4% 6% 8% 10% Improvement of Sway and distortion

16 12mm 14mm 16mm 18mm Far sight/ 遠用実用視野 P-1G Near sight/ 近用実用視野 P-1G Middle sight/ 中間実用視野 P-1G Sway & Distortion/ 揺像・歪像 P-1G P-1W14 SFD P-1W14 SFD P-1W14 SFD P-1W14 SFD 12mm 14mm 16mm 18mm Corridor length 累進帯長 P-1SY14 P-1SY12 P-1SY14 P-1SY12 P-1SY14 P-1SY12 P-1W16 P-1SY12 Comparison of each corridor PAL Corridor length 累進帯長

17 Target user of P-1 SY 1) High additional power user （ Over ） 高加入 2) Hyperopia ( Far sightedness) 遠視 3) Person who cares Sway and Distortion 4) Person who needs Wider vision 5) Person who is NOT satified with other conventional PAL lens （ Front side PAL) 6) Person who wants to have Newest and high advanced products （ such like Back surface PAL ）

18 Myopia 近視 Hyperopia 遠視 Hyperopia : example 遠視 （ Minus lens ） （ Plus lens ）

19 Corridor length types of SEIKO PAL 累進帯長一覧 1 ） P-1 SY (1.74,1.67,1.60 Back surface PAL) 10mm, 12mm, 14mm 2) P-1 W (1.67, 1.56 standard PAL) 14mm, 16mm

20 Advantage of short corridor length 短累進帯長の優位性！ Conventional Short corridor PAL Big Distortion, Big Image sway = Big Distortion, Big Image sway 外面短累進 = 像の歪み・揺れ 大 P-1 SY short corridor Small Distortion, Less Image sway = Small Distortion, Less Image sway 内面短累進＝像の歪み・揺れ 小

１２ｍ ｍ １４ｍ ｍ Corridor Recommended size Minimum size Suggested frame vertical sizes １０ｍ ｍ Near area from FP ： over １７ mm Far area from FP ： over １５ mm Over ３２ mm Near area from FP ： over １５ mm Far area from FP ： over １０ mm Over ２５ mm Near area from FP ： over １９ mm Far area from FP ： over １５ mm Over ３４ mm Near area from FP ： over ２１ mm Far area from FP ： over １５ mm Over ３６ mm Near area from FP ： over １７ mm Far area from FP ： over １０ mm Over ２７ mm Near area from FP ： over １９ mm Far area from FP ： over １０ mm Over ２９ mm

22 N = 2,148 人 Fair 7% Not so comfortable 1% Good 42% Excellent 50% High reputation of Back surface PAL Most of customers are satisfied with back surface PAL

23 Sales increase of Back surface PAL Dramatically increasing

24 Specification 基本性能 Product name : SEIKO P-1SY(Synergy) Material : Index : 1.74 Abbe No: 33 Density:1.47 Index : 1.67 Abbe No: 32 Density:1.36 Index : 1.60 Abbe No: 42 Density:1.22 Coating: Hard Multi coat (99.0%) Design: Back surface PAL & Aspheric design Length of progressive corridor : 10 / 12 / 14mm

25 Production range 製作範囲 S 0.00 to S-10.00, TC-5.00 (Expanded from this Spring) S+6.00, TC+5.00 (Expanded from this Spring) Addition : to Prism : Up to 3.00D Standard diameter : 80mm/75mm Available diameter : mm to 79mm /1mm step 1.67& mm to 79mm /1mm step (+, Plano, MIX) Also small diameter for minus lens available

26 We are supplying the products based on this slogan. We wish to offer people around the world a gentle and comfortable visual life through eyewear by making use of our advance technologies.