Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Blue light presentation


Published on

  • Be the first to comment

Blue light presentation

  1. 1. A new dimension to Ophthalmic Lens Coatings Lens Treatments with aLens Treatments with a Measure of Health ProtectionMeasure of Health Protection HOYA Vision Care Canada
  2. 2. BATTLING the BLUESBATTLING the BLUES The effects of blue light on our eye healthThe effects of blue light on our eye health HOYA Vision Care Canada
  3. 3. ∗ 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
  4. 4. ∗ 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 
  5. 5. ∗ 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
  6. 6. ∗ Where does HEVL light come from? Sources of “Blue Light”
  7. 7. 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
  8. 8. Blue Light Unravelled 380 400 420 440 460 480 500 Most Damaging For Circadian Rhythm LCD Peak
  9. 9. Blue Light Unravelled 380 400 420 440 460 480 500 For Circadian Rhythm
  10. 10. ∗ 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
  11. 11. ∗ 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
  12. 12. 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."
  13. 13. 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
  14. 14. Blue Light Unravelled 380 400 420 440 460 480 500 LCD Peak
  15. 15. HOYA CONFIDENTIAL 16 Cell Phone Game PC TV Blue light from digital equipment Light Spectrum from Today’s Devices 380 400 420 440 460 480 500 LCD Peak
  16. 16. ∗ 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.
  17. 17. 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.
  18. 18. “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 246-249 Ultraviolet Radiation as a Risk Factor for Cataract and Macular Degeneration Roberts, Joan E Ph.D. 380 400 420 440 460 480 500 Most Damaging
  19. 19. ∗ 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
  20. 20. ∗ 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 * 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.
  21. 21. ∗ 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
  22. 22. A new Health-protection dimension to Ophthalmic Lens Coatings
  23. 23. 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
  24. 24. 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
  25. 25. 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
  26. 26. 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
  27. 27. ∗ 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
  28. 28. Positioning LifeStyle - related to Digital lifestyle Health and Wellness - related to risk reduction
  29. 29. ∗ 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
  30. 30. What about Kids ? LifeStyle Will reduction of Blue light at night help kids get a better night’s rest? Health and Wellness Reduction 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."
  31. 31. Recharge vs. HOYA AR HOYA AR (HVVP) RECHARGE Oleophobic / Cleanability Substrate Matched Physical Characteristics (Scratch Resistance, adhesion, longevity) Blue Light reduced insignificant Reflections, Anti-glare properties Residual colour Green Blue
  32. 32. 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, XtrActive Transitions is available Nulux Active 5/8 (tints on Recharge not recommended but allowed) TACT Protegrity iD
  33. 33. 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
  34. 34. Recharge Lens Treatment with aRecharge Lens Treatment with a Measure of Health ProtectionMeasure of Health Protection Glossary of terms and FAQ available Thank YouThank You
  35. 35. ∗ 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
  36. 36. ∗ 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
  37. 37. ∗ 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
  38. 38. ∗ 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