Top Banner
A new dimension to Ophthalmic Lens Coatings Lens Treatments with a Lens Treatments with a Measure of Health Protection Measure of Health Protection HOYA Vision Care Canada
39
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: Blue light presentation

A new dimension to Ophthalmic Lens Coatings

Lens Treatments with a Lens Treatments with a Measure of Health Protection Measure of Health Protection

HOYA Vision Care Canada

Page 2: Blue light presentation
Page 3: Blue light presentation

BATTLING the BLUESBATTLING the BLUESThe effects of blue light on our eye The effects of blue light on our eye

healthhealth

HOYA Vision Care Canada

Page 4: Blue light presentation

Light – High Energy Visible Light - “Blue Light” What is it? From where does it come?

Light and the Human Eye The Issues Associated with HEVL The Solutions HOYA Recharge– technical profile Summary

Agenda

Page 5: Blue light presentation

Visible Light Spectrum: ~ 380nm to 780nm (EN ISO 13666)

The portion of the electromagnetic spectrum that can be detected by the human eye.

Light - Some Basic Definitions

Higher Energy Lower Energy

Page 6: Blue light presentation

What is HEVL? The shortest and highest energy violet-blue range from

380 – 500nm within the visible spectrum, Also called “high-energy blue light” or simply “blue light”

High Energy Visible Light

380 400 420 440 460 480 500

Page 7: Blue light presentation

Where does HEVL light come from?

Sources of “Blue Light”

Page 8: Blue light presentation

High Energy Visible Light

380 400 420 440 460 480 500

Key Issues with HEVL: 1.May be disruptive to natural circadian rhythm(sleep-wake cycle or your internal clock)

2.Easily scattered creating haze that reduces contrast and decreases sharpness and clarity of vision

3.Linked to lens and retinal damage and AMD with accumulation over time

Page 9: Blue light presentation

Blue Light Unravelled

380 400 420 440 460 480 500

Most Damaging For Circadian

Rhythm

LCD Peak

Page 10: Blue light presentation

Blue Light Unravelled

380 400 420 440 460 480 500

For Circadian Rhythm

Page 11: Blue light presentation

Light at night is bad for your health, and exposure to blue light emitted by electronics and energy-efficient light bulbs may be especially so. ”

Issue#1: Effect on Circadian Rhythm

Page 12: Blue light presentation

Circadian rhythm is controlled by Melatonin release.

Blue light (460~480nm) is a powerful suppressor of Melatonin1.

When Melatonin is suppressed after dark our natural sleep rhythm is disrupted.

The Dark Side of Blue Light

Melatonin - hormone secreted by the pineal gland (Brain) also known as the “hormone of darkness” – plays a role in the regulation of the sleep-wake cycle by causing drowsiness.

1. Different wavelengths cited depending upon study. Falchi et al, Journal of Environmental Management 10/2011; 92(10):2714-22. reported 440-500 nm suppresses Melatonin.

380 400 420 440 460 480 500

For Circadian Rhythm

Page 13: Blue light presentation

The Dark Side of Blue Light

In June 2012 the American Medical Association issued a policy recognizing "that exposure to excessive blue light at night, including extended use of various electronic media, can disrupt sleep or exacerbate sleep disorders, especially in children and adolescents."

Page 14: Blue light presentation

Strategies to Protect against HEVL

Blue Absorbing Lenses Amber, Orange, Green,

Physical Screens

placed on top of

device.

Computer software that modifies the emitted spectrum

linked to the computers’ clock.

Low Blue Light

Bulbs that modify the

emitted spectrum

at low energy

Yellow tinted blue absorbing IOLs since 1990’s

Page 15: Blue light presentation

Blue Light Unravelled

380 400 420 440 460 480 500

LCD Peak

Page 16: Blue light presentation

HOYA CONFIDENTIAL 16

Cell PhoneGamePCTV

Blue light from digital equipment

Light Spectrum from Today’s Devices

380 400 420 440 460 480 500

LCD Peak

Page 17: Blue light presentation

Human Eyes are “myopic” to blue light

Higher point spread function more blur.

Issue #2: Reduced Contrast and Decreased Sharpness

Blue light is refracted more than other colours

In a healthy human eye, the yellow pigments of the fovea protect us from this phenomena.

Page 18: Blue light presentation

Digital Eye Strain—Is it a Blue light issue?

“digital eye strain is the most common computer-related repetitive strain injury, surpassing carpal tunnel and tendonitis. 1”

1. The Vision Council : Screens, Phones, Tablets and More: Keeping your eyes safe in a digital Age, 2012.

Reduction of blue light will improve contrast and sharpness which may improve visual comfort, however …

There is no proven link between reduction of blue light and alleviation of symptoms related to Digital Eye Strain.

Targeted lens designs (i.e. Nulux Active 5/8 and TACT) can support the visual requirements in use of such devices.

Page 19: Blue light presentation

“In addition to UV radiation, short blue visible light (400-440 nm) is a risk factor for the adult human retina. This wavelength of light is not essential for sight and not necessary for a circadian rhythm response. For those over 50 years old, it would be of value to remove these wavelengths of light …”

Issue #3: Damage to the retina

Source:Eye & Contact Lens: Science & Clinical Practice: July 2011 - Volume 37 - Issue 4 - pp 246-249Ultraviolet Radiation as a Risk Factor for Cataract and Macular DegenerationRoberts, Joan E Ph.D.

380 400 420 440 460 480 500

Most Damaging

Page 20: Blue light presentation

The cornea generally blocks UV light below 295nm from reaching the human lens.

The lens filters out UVB above 295 and UVA (315 – 400nm) and shorter wavelengths (HEVL) of blue light from reaching the

retina1.

Light and the Healthy Human Eye

From 40 years - the photo-protective system breaks down and lens yellowing (opacification) begins

1. Joan E. Robers, Photobiology of the HUMAN LENS, Fordham University, American Society of Photobiology

2. M. Rozanowska et al., Photobiology of the RETINA, Cardiff Vision Institute, American Society of Photobiology.

“Overall the transmission of visible light is significantly reduced in older lenses, especially in the blue region of the spectrum.” 2

Page 21: Blue light presentation

Despite natural defences, visible light, including blue light, reaches the retina and has been linked to retinal damage

Beaver Dam Eye Study showed increased exposure to light in Teens, 20s, 30s increased onset age of AMD by 10 years, effectively doubling the chances of blindness during lifetime.*

Retinal Damage and HEVL

http://www.bdeyestudy.org/

* Tomany, S., Cruickshanks, K., Klein, R., Klein, B., Knudtson, M. Sunlight and the 10-year incidence of age-related maculopathy: the Beaver Dam Eye Study. Arch

Ophthalmol. (2004) 122(5), 750-757, Correction (2005) 123(3), 362.

Page 22: Blue light presentation

The eye has natural defenses against UV and HEVL Despite these, accumulated exposure to HEVL may

contribute to eye damage (Lens and Retina), Long term studies and animal studies suggest a link

between HEVL and eye damage but we cannot say that HEVL causes eye damage,

The higher energy/shorter wavelengths (380-440nm) of the visible spectrum are associated with eye damage.

Key Point Summary: Retinal Damage

380 400 420 440 460 480 500

Most Damaging

Page 23: Blue light presentation

A new Health-protection dimension to Ophthalmic Lens Coatings

Page 24: Blue light presentation

A NEW ophthalmic lens treatment that provides visual comfort and a measure

of protection from Blue Light risks.

Recharge adds a new “health-protection” dimension

to the benefits ascribed to lens coatings and offers compelling new reason to apply lens treatments.

What is it….

HOYA Recharge

Page 25: Blue light presentation

What it does...

Reduces blue light that reaches the eyes day and night Enhances contrast for visual comfort Helps protect against accumulated potential harmful affects

of High Energy Visible Light (Blue Light) Provides familiar HOYA AR quality on physical attributes

(adhesion, scratch resistance, longevity, cleanability) Reduces glare and reflections

HOYA Recharge

Page 26: Blue light presentation

30% reduction in HEVL (Blue Light)

Recharge– Cuts HEVL (Blue Light) by

30%

± 3%

% reduction of Blue light varies slightly by material.

Phoenix > 1.60 > 1.67 > 1.50

(* 1.50 has UV applied)

(Poly blue light reduction is only 20%)

* Data on file: HOYA Coporation

Page 27: Blue light presentation

Blue Light

%T %R

Most Damaging

LCD Peak

For Circadian Rhythm

Recharge Reducing –

30% of HEVL (Blue Light)

380 400 420 440 460 480 500

Page 28: Blue light presentation

How does it work? By reflecting blue light Manipulation of the thicknesses of the layers

in the “multi-coat layer” Material used in the layers.

Mechanism of Action

Page 29: Blue light presentation

Positioning

LifeStyle - related to Digital lifestyle

Health and Wellness - related to risk reduction

Page 30: Blue light presentation

LifeStyle Approach--Based on device usage

COMFORT People with High usage of LCD devices; smartphones, tablets,

computers Gamers, night owls, Students, Overexposed to sunlight**

Which type of patients?

Health and Wellness Approach--

Based on professional judgement

PREVENTION Patients with AMD risk factors,

including Family history, Light eye colour, Measured low macular pigment

(MPOD) Smoking Obesity

Match Recharge with Nulux Active TACT

** also an identified risk factor

Page 31: Blue light presentation

What about Kids ?

LifeStyleWill reduction of Blue

light at night help kids get a better night’s rest?

Health and WellnessReduction of long-term

accumulation HEVL may reduce risks of retinal

problems

In June 2012 the American Medical Association issued a policy recognizing "that exposure to excessive blue light at night, including extended use of various electronic media,

can disrupt sleep or exacerbate sleep disorders, especially in children and adolescents."

Page 32: Blue light presentation

Recharge vs. HOYA AR

HOYA AR (HVVP) RECHARG

E

Oleophobic / Cleanability

Substrate Matched

Physical Characteristics (Scratch Resistance, adhesion, longevity)

Blue Light reduced insignificant

Reflections, Anti-glare properties

Residual colour Green Blue

Page 33: Blue light presentation

Availability

Material Availability Style Availability

1.50 ( included with UV block)

iD Mystyle (except 1.50)

1.53 Phoenix iD LifeStyle

1.60 ARRAY

1.67 iQ (Summit, Amp, SV, FT28)

NOT AVAILABLE on:SunTech, Vantage, XtrActiveTransitions is available

Nulux Active 5/8

(tints on Recharge not recommended but allowed) TACT

Protegrity iD

Page 34: Blue light presentation

Summary

Recharge reduces blue light by 30% in the HEVL spectrum Provides a measure of protection from the risks of HEVL May be prescribed for HEVL reduction to reduce long-term

risk of Blue light associated with retinal damage and cataracts

Increases contrast and visual sharpness Suitable for lifestyles with high HEVL exposure

High LCD device users, gamers, students

Reduces reflections and glare

Page 35: Blue light presentation

Recharge Lens Treatment with a Recharge Lens Treatment with a Measure of Health Protection Measure of Health Protection

Glossary of terms and FAQ available

Thank YouThank You

Page 36: Blue light presentation

Visible Light 380 – 780 nm The spectrum of electromagnetic energy which is generally detectable by the human eye.

High Energy Visible Light (HEVL): Light largely within the visible spectrum that has the shortest wavelengths (380 -500 nm) and the highest energy. Sometimes referred to “Blue Light”

Blue Blocking Lenses: yellow/red/amber lenses that block blue light by absorption (rather than reflection of blue light)

Melatonin:A hormone secreted by the pineal gland(Brain) also known as the “hormone of darkness” – plays a role in the regulation of the sleep-wake cycle. Melanin is suppressed by blue light in the range of 460-480nm. When suppressed it fights sleep, and may lead to conditions associated with lack of sleep.

Definition of Terms

Page 37: Blue light presentation

How much “blue light” does Recharge reflect?Recharge reflects about 30% over the HEVL range (380 – 500nm)

If Recharge only reflects 30% - why bother? Does it do any good at all?The scientific evidence linking blue light to a number of problems, including retinal damage (AMD), sleep disorders and other systemic disease is growing. Recharge is an easy way to reduce the aggregate affect of potentially harmful HEVL and still provide substantial benefits of an AR coating.

Is the link between blue light and AMD proven?Identification of a link or association does not mean that we can conclude a causal effect. There is ample scientific evidence to indicate that there is a link, but we cannot say there that blue light is a cause of AMD or retinal damage. More research is required.

FAQs

Page 38: Blue light presentation

Does Recharge block “good” blue light?“Good” blue light is referred to that part of the visible light spectrum that is necessary for natural circadian rhythm. Good blue light contributes to the day time suppressing of an important hormone (Melatonin) that regulates our sleep/wake cycle.  At night with darkness, and light removed, the hormone is released and induces sleepiness in a natural way.  Recharge has no effective impact on the range of blue light that influences this important hormone. (i.e. blue light passes through allowing day time suppression )

“good blue light” has a bad side.  If our eyes are continually exposed to blue light before bed time, the hormone that induces natural sleep may not be released (or continues to be suppressed) and we remain alert and possibly restless.  Either way, the light influencing this hormone is not appreciably affected by Recharge. Behaviour changes and physical devices like screens etc. may be necessary to avoid the influence of blue light on sleep.

FAQ

Page 39: Blue light presentation

Does Recharge AR affect scotopic (low light) vision tasks like night driving? In a review of recent studies, clinical studies indicate that blue blocking IOLs had no impact difference in performance on blue blocking and non-blocking IOLs on Scotopic vision performance. It is reasonable to assume that blue light reduction of Recharge will have no impact on night vision.

Will Recharge help my kids sleep better at night if they view computers before bedtime?Blue light is important in the control of the sleep-wake cycle (Circadian rhythm). There is a small and reduction of the blue light in the range that is associated with this cycle, but there is no clinical evidence that this small reduction will affect the sleep/wake cycle.

There are higher reflections on Recharge compared to HOYA ARs. Will Recharge be available with less reflections similar to HI VISION VP for example?There will always be a compromises between a coating’s ability to reduce HEVL and reflections. We believe that Recharge meets this compromise in an effective manner. If patients want a purely cosmetic approach with absolute minimal reflections, then EX3 is recommended.

FAQ