Updated progressive lens design

Updated progressive lens design
By Eric Tam,
Registered Optometrist (Part 1)
BSc (Hons) in Optometry
1
Introduction
Optics related to eye anatomy
Innovation on lens design
Role play with your customers
2
You should know this
book.
Ophthalmic Lenses AND
Dispensing
Author: Mo Jalie
3
Courtesy of Butterworth
Heinemann???
Book Recommendation
Modelling the Eye on the Prescription
b. Center of Rotation
c. Retinal Curvature
a. Eye length :
+8.00 D.
-12.00 D.
Plano
Axial Ametropia?
4
28
20.5mm
23 mm
Eye Scan Analysis
Hyperopia
5
Myopia
A. Eye length varies up to 30%
A
30,00
Axial length (mm)
28,00
26,00
24,00
Eye length
measurement according
to eye correction
22,00
20,00
-10,00
-8,00
MYOPE
6
-6,00
-4,00
-2,00
18,00
0,00
Amétropia (dpt)
2,00
4,00
6,00
HYPEROPE
Modeling from Prescription
B. The Center of Rotation
B
.
7
..
c. The retinal curvature
Equatorial Radius
mm
C
Scan and MRI allow also to
analyse the retina curvature
according to the prescription.
Axial Length mm
8
The position of the centre of rotation
influences fields of vision
A longer eye (myope)
sweeps a broader area
9
Myope
Hyperope
The position of the centre of rotation
influences fields of vision
Myope
Hyperope
10
The length and the curvature of the eye
influence Swim Effect
A shorter eye (hyperope) needs a
softer surface
to compensate a higher density
of aberrations in the peripheral
area
11
The length and the curvature of the eye
influence Swim Effect
12
Innovation on lens design
You should know this
lens manufacturer.
13
EVOLIS : accounting prismatic effect
A dedicated design for each presbyope family
Takes into account the
Lp 10.4 mm
prismatic effects
Myopia
Emmetropia
Lp 11.5 mm
Hyperopia
Lp 12.2 mm
EVOLIS
14
Ametropia
EVOLIS
Vertical Prismatic effect
Base UP
Hyperopes look
further down
15
Base Down
EVOLIS
Horizontal Prismatic effect
Base IN
Hyperopes look
further inwards
16
Base OUT
EVOLIS
RE
Lp 10.4 mm
Lp 11.5 mm
Lp 12.2 mm
Prismatic
Effects
17
World Class Progressives
PERSONALISATION
SOPHISTICATION
EVOLIS®
UNIVERSAL
iPAL Series
18
APTIVE®
SHORT FIT®
RANGE
ENTRY-LEVEL
MID-RANGE
HIGH
PREMIUM
goes further on individualisation
thanks to BBGR Biometric TechnologyTM
The first lens that adapts
to the Eye’s Anatomy
19
ANATEO vs EVOLIS
20
Anateo’s Success Factors
ANATEO
Lp 10.4 mm
Lp 11.5 mm
Lp 12.2 mm
EVOLIS
21
ANATEO
Ametropia
EVOLIS
Ametropia
Eye Anatomy
An individualised conception
22
Softer Surface
Wider field of Sharp Vision
For short eyes (hyperopes)
For long eyes (myopes)
Anateo : Proven performance with wearer test
Wider Fields of Vision
More Comfortable with
reduced Swim Effect
Faster adaptation due to
quicker & more accessible
discovery of Visual space
100%
80%
60%
23%
0%
23
Few hours
27%
40%
20%
22%
43%
Traditional
PALs
57%
66%
Evolis
Anateo
Immediate
Anateo : Proven performance in the market
2.4%
21.9%
75.8%
3.8%
20.0%
76.2%
4.0%
22.4%
Far Vision
Near vision
73.6%
Mid-distance
77.9%
5.5% 19.9%
Wearer moving
0%
20%
40%
Worst
24
60%
Identical
80%
Better
100%
PDM
… WITH FRAME FITTING CUSTOMIZATON
PDM
25
PDM
PDM
ANATEO PDM
Lp 10.4 mm
Lp 11.5 mm
Frame
Wear
Parameters
Lp 12.2 mm
ANATEO PDM
26
Ametropia
Eye Anatomy
ANATEO
Ametropia
Eye Anatomy
EVOLIS
Ametropia
Framization
FRAMES HAVE DIFFERENT FITTING CHARATERISTICS
FRAME CURVE ANGLE
VERTEX
FRAME TILT ANGLE
27
Product performance
PDM: USE FOR NON-STANDARD DATA
Anateo
with PdM option
AnateoTM
with PdM option
AnateoTM
Standard progressive
lens
Non standard
wearer data
Standard wearer data
Eye-Lens Distance = 11 to 13mm
Frame Tilt = 4 to 10 degrees
Frame Wrap = 0 to 8 degrees
28
Non standard
wearer data
WHEN TO USE ANATEO PDM
29
Tools/ Inclinometer adapted for PDM
FRAME CURVE ANGLE
EYE LENS DISTANCE
30
FRAME TILT ANGLE
Tech Specifications
31
Future: ANATEO MIO
ANATEO MIO
Reading Dist
Framization
Ametropia
Eye Anatomy
Lp 10.4 mm
Lp 11.5 mm
Reading
Distance
32
Frame Wear
Parameters
Lp 12.2 mm
ANATEO MIO
Ametropia
Eye Anatomy
Framization
ANATEO PDM
Ametropia
Eye Anatomy
Framization
ANATEO
Ametropia
Eye Anatomy
EVOLIS
Ametropia
Reading Dist
The EYETAB – For ANATEO MIO
ANATEO PDM + EYETAB = ANATEO MIO
Measure
Reading Distance
Winner 2010
A pioneering
measurement device
EyeTab® automatically
measures the distance
between the reading
surface and the lens, based
on the wearer’s natural
reading posture.
33
Availability
EVOLIS
NOW
AVAILABLE
PDM
MIO
2010 Winner of the Silmo d’Or
Europe’s Top Selling Progressive
34
Coming
Soon!
Summary
Bibliography References:
Atchison DA , Jones CE, Schmid KL, et al. Eye shape in
emmetropia and myopia. Investigative Ophthalmology and
Visual Science. 2004; 45: 3380-3386.
Grosvenor T, Goss D, Clinical management of myopia, London: Butterworth Heineman, 1999.
Mo Jalie, Ophthalmic Lenses & Dispensing, Butterworth Heinemann,3rd Edition, 2008.
Gilmartin B ,Myopia: precedents for research in the twenty-first century
Clinical & Experimental Ophthalmology, 2004; 32: 305–324
35
Courtesy of Butterworth
Heinemann???
Optics related eye anatomy
Innovation on lens design
THANK YOU
36
光學鏡片鍍膜技術
如何與時並進改善人類生活
Mr. Bryan Ng
MBA, M(Optom).
UNSW, Australia
Copyright© Essilor 2012
現代鍍膜基本技術
鍍膜結構
易潔表層
防反光鍍膜
防花加硬鍍膜
Copyright© Essilor 2012
Copyright© Essilor 2012
Copyright© Essilor 2012
防污易潔功能
令眼鏡易於清潔
Super Oleophobic Coat
抗污表層
Easy clean & smudge resistant
油性箱頭筆形成水珠狀墨點
Copyright© Essilor 2012
Scratch resistance
Copyright© Essilor 2012
Scratch
Smudge
™
Dust
Water
- technologyTM
Slide -Fx
ons +
ntelligence
Step 2 : Molecule Densification
With
-technology
TM
:
The intense increase in energy causes
all molecules, including the new
conductive molecules responsible for
the dust-repellence efficiency, to
create a compact and more uniform
matrix for optimal efficiency.
Without
During the evaporation process,
AR and topcoat molecules are energized by
ions.
With
Without
- technology
TM
regular anti-reflective lens actually attracts dust, and even
more when cleaned.
1
2
3
4
When a lens is
covered with
dust, it needs
to be cleaned.
Wiping generates
negative
electrostatic
charges on the
surface of the
lens.
After wiping, the
positive dust
particles are
attracted
by the negative
electrostatic
charges.
Consequently,
the lens is never
really free of dust
or perfectly clean.
The results are clear
Thanks to -technologyTM, Crizal Forte UV lenses
remain completely transparent by combining
• the best dust-repellent efficiency with
• a surface proven to be the most hydrophobic on the
market
Before wiping
After wiping
Measurement of Hydrophobic
efficiency
The contact angle measures the angle of drop of water on the lens
surface.
The higher the angle value,
The higher the water repellence performance.
Low
contact
angle
High
Contact
angle
HSD ProcessTM
The
ProcessTM (High Surface Density ProcessTM) of
New Crizal Forte UV allows to increase the density of
hydrophobic and oleophobic perfluorosilane molecules on the
lens surface. Therefore, the surface is perfectly covered.
Standard Top
Coat
Top Coat molecules are
disconnected.
The lens surface is not totally
covered.
Crizal Forte UV Top
Coat ProcessTM
Top Coat molecules are closely
linked. The densification brings a
perfect coverage of the surface of
the lens .
Thanks to the
ProcessTM, Crizal Forte UV Top Coat
molecules perfectly cover the surface of the lens. It increases the
contact angle. Thus smudges and water droplets are much more
repelled from the surface of the lens and smudge-resistance is
improved.
With
Without HSD
106°
Contact angle of a drop of
water on a standard Top
Coat
ProcessTM
116°
Contact angle of a drop of
water on Crizal Forte UV Top
Coat
鏡片鍍膜標準測試
Bayer Sand – 滾砂測試 (MC)
顯微鏡檢查鍍膜情況
鋼刷測試 (MC+HC)
Copyright© Essilor 2012
易潔測試 (ECC)
Glossary : Anti-reflective Efficiency
The % of Global performances in AR Efficiency taking
into account Reflection and Chroma
Reflection
Rv%
Chroma
(class)
Hue (°)
« Rv » value mean Reflection : The lower the value, the more efficiency the AR coating
5 classes : Higher the class, lower the Rv
•Class 1 : Rv% > 4
•Class 2 : 2<Rv%<4
•Class 3 : 2<R%<1
•Class 4 : 1<Rv%<0.5
•Class 5 : Rv%<0.5
« C » Chroma : intensity of residual colour : the lower the value, the less visible the AR
coating
•Class 1 : C>30
•Class 2 : C between 15 & 30
•Class 3 : C between 7 & 15
•Class 4 : C between 4 & 7
•Class 5 : C < 4
« h » Hue : Colour angle on the L a*b* colorimetric graph
No class, no evaluation, only informative value in degree
Glossary : Scratch Resistance Efficiency
The % of Global performances in Scratch Resistance Efficiency taking
into account Sand Bayer test, ISTM Bayer test, and Steel Wool test
Bayer
tests
Steel Wool
test
Bayer ISTM : Simulation of the thin superficial scratches tearing off the AR coating
Bayer Sand : Simulation of scratches of medium depth tearing off the AR coating and
part of hard coat
5 classes : higher the class, better the Scratch Resistance
•Class 1 : Bad
•Class 2 : Average
•Class 3 : Good
•Class 4 : Very good
•Class 5 : Excellent
Simulation of deep scratches tearing off the AR coating, the hard coat, and
potentially part of the substrat
3 classes : Higher the class, better the Scratch Resistance
•Class 1 : Bad
•Class 3 : Good
•Class 5 : Very Good
Glossary : Cleaning Efficiency
The % of Global performances in Cleaning Efficiency taking
into account Cleanability, Anti-static and Contact Angle
Evaluation
of
oleophobic
efficiency
(Cleanabili
ty)
Simulation of the number of wipings needed to get rid of a calibrated sebum on the surface of
the lens correlated to oleophobic efficiency
5 classes : higher the class, less wiping are needed
•Class 1 : Bad
•Class 2 : Average
•Class 3 : Good
•Class 4 : Very good
•Class 5 : Excellent
Evaluation
of Antistatic
efficiency
(JCI test)
Charge applied on the surface of the lens, evaluation of the time necessary for the charge
to desappear from the lens
•Class 1 : Without Anti-static layer
•Class 5 : With Anti-static layer
Evaluation
of
hydrophob
ic
efficiency
Measurement of the angle of a drop of water on the lens surface
5 classes : Higher the class, more water repellent
•Class 1 : Angle < 30°
•Class 2 : Angle between 30°& 105°
•Class 3 : Angle between 105°& 110°
•Class 4 : Angle between 110°& 115°
•Class 5 : Angle > 115°
Sliding
Angle
Measurement of the sliding angle of a drop of water on inclined
plane
No class, only the value in degree
Lower the value, better the Water Repellence
Glossary : UV Protection
E-SPF category taking into account backside reflection :
The higher the E-SPF, the better the UV Protection
E-SPF
(Category)
The global protection factor integrates : UV passing through the lens , and
UV reflected by the back side
The higher the E-SPF, the better the UV Protection
•Category 3* : E-SPF value 1 to 3 -> Ruv > 33%
•Category 5* : E-SPF value 3 to 7 -> 33%>Ruv>14%
•Category 10*: E-SPF value 7 to 15 -> 14%>Ruv>7%
•Category 25*: E-SPF value 15 to 49 -> 7%>Ruv>2.5%
*E-SPF could be different in 1.5 refractive index
Copyright© Essilor 2012
The most advanced AR lens,
Now with exclusive backside UV protector
最先進的AR鏡片
採用獨創的後方紫外線防護技術。
SCRATCH-RESISTANCE
NEW
AR EFFICIENCY
BROAD SPECTRUM TECHNOLOGY
DUST REPELLENCE
SMUDGE & WATER REPELLENCE
FRONT
BACK
SMUDGE & WATER REPELLENCE
DUST REPELLENCE
LENS
AR EFFICIENCY
SCRATCH-RESISTANCE
Result: Front & back UV minimized
結果: 前及後表面紫外線消除
Front
UV Transmission cut by Material
前方
鏡片物料阻擋紫外線透過鏡片前面入侵眼睛
+
Back
UV Reflection stopped by Crizal Forte UV
後方
Crizal Forte UV 同時阻擋來自鏡片後面和側面的紫外线反射
Introducing the
“Eye- Sun Protection Factor”
鏡片全效防紫外線指標 E-SPF
E-SPF Definition
www.espf.com
現代城市人生活上會經常遇到…..
現代人的生活….
現代城市人生活上會經常遇到…..
24
10
22
10
20
10
g rays
Wavelength10-16
(nm)
-14
10
18
10
X rays
-12
10
-10
10
16
14
10
UV
-8
10
12
10
IR
-6
10
10
10
8
10
10
Microwave
-4
-2
10
10
F
M
6
10
4
10
A
M
Radio
waves
0
2
10
10
2
0
10
10
Long radio waves
4
10
6
10
8
10
Visible light (380~780nm)
40
0
45
0
Blue light
380nm ~ 500nm
50
0
55
0
Wavelength/ nm
60
0
65
0
70
0
75
0
Environment
Digital Eyestrain is a Common Symptom
(U.S., Eye-strain and other visual problems associated with computer, all age grou
Potential cause of eye-strain
•Long hours on digital screens
(Excess use of accommodation)
Eye-Strain
90%
•Blue lights from LED lights & compute
(glare and flicker)
Source: National Institute of Occupational Safety and Health in America
Environment
- LED device
- Organic EL device
- High energy
- Easy to scatter
LED device
Organic EL device
- Blue light emission
Spectral radiance/ W/sr-m2-nm
Blue light
5.0
4.0
3.0
2.0
1.0
0.0
380 430 480 530 580 630 680 730 780
wavelength/ nm
Concept of SEECOAT BLUE Development
「Blue Light」: Increases to eyes
「Blue Light」= Easy to disperse
藍光容易散射
Why Blue Light disperse easily
Long wavelength
（Red）
Low frequency of contact
Short wavelength
(Blue）
High frequency of contact
４.４ times more
「Blue Light」 are easy to disperse, causing glare
Blue Light Care
How to reducing Blue light?
Transmissivity distribution(%)
Tinting vs Coating
100
分
90
光
透
過
率
(
－ Standard AR Coating
％
)
－ SEECOAT BLUE
80
－ TINTING
70
400
450
500
550
波長(nm)
600
Wavelength (nm)
650
700
Reflects and cuts Blue light by 10%
Reflection
Reflects and cuts powerful blue light (380 ~ 500nm)
which has higher tendency to disperse among the visible light

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