1. TOKAI OPTICAL Back Surface Indoor Progressive [BS-Indoor]

2. Full Line-up for Back Surface series 1.70BS-C 1.70BS-13 1.70BS-15 1.60/42BS-C 1.60/42BS-13 1.60/42BS-15 Reading Progressive 1.70BS-Reading 1.60/42BS-Reading Indoor Progressive 1.70BS-Indoor 1.60/42BS-Indoor Progressive 13, 15 mm Selectable progressive corridor 17mm 11mm A corridor length of Indoor progressive would be Longer than far to near progressive Gentle power changing and providing enough clear depth

3. Max 3~4m (Tokai research) [Middle] Distance range 1m2m3m4m5m6m Most of people can’t see far distance well Mainly 1~2m Basic glasses would be Progressive

4. 1. Corridor Length11mm +8 -11 +6 -13 2. Corridor Length13mm Comfortable for the near but the distance portion is too high. Distance +6 Reading –13 Checking the near vision usefulness Considering Power distribution from distance to near

5. 13~15mm Progressive 11mm ８ mm 13mm 13.5mm Other Maker’s Indoor progressive 15mm ６ mm 10mm In total 19mm Much longer corridor length will be better

6. Entrance of near vision -13mm EP Entrance of distance vision 10mm 6mm Near power Distance power Clear intermediate vision & comfortable near vision comfortable near vision F.P.S. F irst P riority S hifting Gentle power changing Wide clear vision Corridor Length 23mm

7. The upper part : Widen clear vision The near portion : Wide enough near vision Ordinary Indoor Progressive Astigmatism distribution

8. The upper part : Widen clear vision The near portion : Corridor Length 19mmAstigmatism Other maker’s Indoor progressive

9. A weaker power around EP makes the wearer looks intermediate vision easily Ordinary Indoor Progressive Power map

10. A weaker power around EP makes the wearer looks intermediate vision easily Power map Other maker’s Indoor progressive

11. 16mm 2mm Geometric Center Distance vision Near vision 14mm 1.5mm1.0mm Real Far EP 2 step adding way 13mm 10mm Corridor Length 23 mm Layout Layout Layout fixed

12. ・ Other maker’s Indoor progressive ADDITION1.00D2.00D3.00D EP ADD(25%)0.25D0.50D0.75D Farthest point4m2m1.33m 3 mm up from EP ADD(12.5%)0.13D0.25D0.37D Farthest point8m4m2.67m Addition at EP ADDITION 1.00D2.00D3.00D EPADD(37.5%)0.38D0.75D1.13D Farthest point2.63m1.33m0.88m 3 mm up from EP ADD(27.5%)0.28D0.55D0.83D Farthest point3.57m1.82m1.20m

13. In case of ADD 2.00D Ordinary Indoor progressive It is possible to see intermediate vision without force 2m 4m On hand 1.33m 1.82m

14. ODN design considering nose side Reducing nose side astigmatism and distortion Reducing slantwise aberration Easy to make a focus

15. ODN Design Feature of Indoor Progressive 23mm Easily clear vision at intermediate vision Widen clear visionComfortable near vision

16. Back Surface Progressive Design Assuming a progressive and aspheric surface Designing an ideal surface, which combines dioptoric, aspheric and progressive surface

17. Lower BS-Indoor Ordinary Progressive Higher 15 Kinds of Front Base Curve

18. Standard base curve Lower Higher Front Base Curve The lens is thin. Almost same distance from lens-front to face at any place = Deformation ratio is small. The lens is thick. Almost same distance from eye to lens-back at any place = Distortion is small Increasing ophthalmic performance Increasing cosmetic performance

19. Merit of [BS-Indoor] Back Surface Progressive Design 15 Kinds of Front Base Curve FPS Design Selectable base curve from lower or higher ODN Design

20. TOKAI PROGRESSIVE LINE-UP Hi GradeBasic Near Vision BS-C, BS-13 and BS-15 Back surface progressive 13mm PROGRESSIVE, 15mm PROGRESSIVE Standard Progressive BS-Reading, LARGO and READERS Reading Progressive Far Vision BS-Indoor Back Surface Indoor Progressive

21. BS Series LINE-UP 1.60/42BS-C UV CMC 1.70BS-C UV CMC 1.70BS-15, 1.70BS-13 1.60/42BS-15, 1.60/42BS-13 1.70BS-Reading 1.60/42BS-Reading 1.70BS-Indoor 1.60/42BS-Indoor Hi-grade Basic Far Intermediate Near

22. Full line-up for Senior Far Intermediate Near 1.50-15 PROG. 1.60/42-15 PROG. 1.60/42-13 PROG. 1.50-13 PROG. 1.60/42 BS-C 1.70 BS-15, 1.70 BS-13 1.70 BS-C 1.60/42 BS-15, 1.60/42 BS-13 HI-READERS PRO-READERS 1.50 LARGO 1.60/42 LARGO 1.70-15 PROG. 1.70BS-Reading 1.60/42BS-Reading 1.70BS-Indoor 1.60/42BS-Indoor 1.70-13 PROG. SUNSENSORS-15 PROG.

24. A view of both sides are wider than progressive. (3~5 times) ◎ A view of both sides are wider than progressive. ○Near It is possible to see from screen to hand. (wider than Middle vision) ◎ It is possible to see from screen to hand. ○ Computer It is impossible to see the white board, TV and so on in conference. (* It depends on power, control power and distance) △ It is possible to see the white board, TV and so on in conference. (*Max5m) ◎ Intermediate It is possible to see only in the range which the hand reaches. × It is possible to see using the upper part of lens. △ Far LAGRO (Near Vision) BS-Indoor (Intermediate Vision) The difference of BS-Indoor and LARGO

25. #The customer who uses lens for only desk work. #The customer who sees the range that hand reaches basically. #computer, reading books and newspapers, flower arrangement, calligraphy, fancywork, chess. #The customer who uses lens for only indoor. #The customer who does the desk work and watch the white board etc with having a sheet. (Near field to 3m) #indoor worker (including beautician, chef etc) conference, eating, watching TV, culture school. LARGO (Near Vision)BS-Indoor (Middle Vision) Suitable for Point: Please catch that the customer wants to say most through the conversation.

26. Minimum diameter Thickness balance Thickness balance If taking a thickness balance of top and bottom… the bottom thickness after edging will be thicker than the top. We supply well-balanced thickness using proper prism. Maximum diameter Large radius Frame shape Small radius

27. Frame shape Thickness balance Thickness balance If producing with standard size easily... the thickness of frame shape will be thick. We recommend to indicate a diameter or SLICE.