Comparison of Light Based

Home Use Devices and

Measuring IPL Ocular Hazard

Dr Caerwyn Ash, PhD

Safety of Home Use Light based Devices

East India Club, London UK

22nd November 2010

The following potential conflict of interest

relationships are germane to my presentation:

Salary, equipment, travel expenses

paid by CyDen Ltd.

Statement of Disclosure

Previous Studies Investigating

Professional IPL systems

Measuring key parameters of intense pulsed light

(IPL) devices

Town G, Ash C, Eadie E, Moseley H.

J Cosmetic Laser Therapy 2007; 9:3:148-160.

Relevance of the structure of time-resolved

spectral output to light-tissue interaction using

intense pulsed light (IPL)

Ash C, Town G and Bjerring P. Lasers in Surgery and

Medicine 2008; Vol 40:2: 83-92.

Fluence Energy density (J/cm2)

Spectral Distribution Photon intensity of the range of wavelengths emitted

Pulse Duration The total time period of light emission of pulse or pulses

Spatial Distribution The distribution of emitted energy across the treatment area

Time resolved spectral data shows the change in spectral distribution and fluence with time

Key Parameters for Therapeutic Effect

Summary Output Energy Measured Energy

L50(300)A-IPL-SH

PD300-3W

Nova 2,

Energy/Power Meter

Both sensor heads are calibrated for 350-1100nm Damage threshold for maximum energy and pulse width is considerably high with respect to typical

home use devices

L50(300)A-IPL has a large measurement area

Summary Pulse Duration

Tria Beauty, Tria

Remington, iLight

Philips, Lumea

Rio, IPL 8000

Town G, Ash C, Eadie E, Moseley H, (2007), Measuring key parameters of intense pulsed light (IPL) devices. J Cosmet Laser Therapy, 9(3):148160. Town G, Ash C, (2009), Measurement of home-use laser and intense pulsed light systems for hair removal: Preliminary report Journal of Cosmetic and Laser

Therapy 11: 157168

Summary Spectral Distribution

Town G, Ash C, Do Home-Use Hair Removal Lasers & Intense Light Devices Deliver What They Promise, Journal of Australasian Cosmetic Laser Therapy

Summary Time Resolved Spectral Analysis

Town G, Ash C. Are Home Use IPL Devices Safe? Lasers Med Sci

Summary Spatial Distribution

Thomas G, Ash C, Hugtenburg R, Kiernan M, Town G, (2010), Investigation and Development of a Measurement Technique for the Spatial Energy Distribution

of Home-Use Intense Pulsed Light (IPL) Systems, Journal of Medical Engineering & Technology, (In Review)

Summary Safety Mechanism

Tria Rio Laser Epilflash

Summary

Box colours pantone reference

Ocular Hazard Risk Assessment

Retinal Damage Photochemical (blue) Infrared hazard to cornea and lens Iris

Summary Ocular Hazard Risk Assessment

Retinal Thermal Hazard Angular subtense () Pulse Duration Exposure Limits Spectral Irradiance (Wm-2nm-1) Solid Angle () Weighted Radiance Compare Spectral Irradiance with Radiance

Eadie E, Miller P, Goodman T, Moseley H, (2009), Assessment of the Optical Radiation Hazard From a Home-Use Intense Pulsed Light (IPL) Source, Lasers in

Surgery and Medicine, Volume 41 Issue 7, Pages 534 - 539

Town G, Ash C. Are Home Use IPL Devices Safe? Lasers Med Sci

Summary Methodology

Ocean Optics Spectrometer (Wm2nm1) Spectra suite Software (Ocean Optics) Tungsten Calibration Lamp FOIS-1 Fibre Optic Integrating Sphere Neutral Density filter (measured Coefficients) cosine correction IEC TR 60825-9, BS 8497-2:2008 standards Dark Frame Correction Assessment in Dark ambient

Eadie E, Miller P, Goodman T, Moseley H, (2009), Assessment of the Optical Radiation Hazard From a Home-Use Intense Pulsed Light (IPL) Source, Lasers in

Surgery and Medicine, Volume 41 Issue 7, Pages 534 - 539

Town G, Ash C. Are Home Use IPL Devices Safe? Lasers Med Sci

Summary Ocular Safety - Results

Eadie E, Miller P, Goodman T, Moseley H, (2009), Assessment of the Optical Radiation Hazard From a Home-Use Intense Pulsed Light (IPL) Source, Lasers in

Surgery and Medicine, Volume 41 Issue 7, Pages 534 - 539

Town G, Ash C. Are Home Use IPL Devices Safe? Lasers Med Sci

Summary Ocular Safety - Results

Eadie E, Miller P, Goodman T, Moseley H, (2009), Assessment of the Optical Radiation Hazard From a Home-Use Intense Pulsed Light (IPL) Source, Lasers in

Surgery and Medicine, Volume 41 Issue 7, Pages 534 - 539

Town G, Ash C. Are Home Use IPL Devices Safe? Lasers Med Sci

Summary Summary

Proposed guidelines for measurement techniques presented here was adapted from the professional

industry, collaborative discussion is welcome.

All equipment is commercially available.

This study shows that even low-fluence IPL systems can be a risk to safe ocular viewing if near ultraviolet emission

(i.e.,

Summary Conclusions

Consumer devices for healthcare should be clinically effective whilst being safe, whilst cost-effective in mass

production.

Domestic market for home use light based products is growing fast and far-east duplicates could take

advantage of market with no regulations and potentially

damage the overall market.

Interlocks should be difficult to bypass but not hinder treatment

Summary