When choosing safety eyewear for LED's such as the ones used in PDT or therapeutic applications the 'peak' wavelength of the LED needs to first be established.  Unlike lasers, LED systems are typically a broad band light source and therefore if its specified with a peak wavelength of 655nm, then the full wavelength band may go from 635nm to 675nm (ie +/-20nm around the peak wavelength).  It is therefore useful to take this into account when choosing safety eyewear.

Laser safety eyewear is designed to be specific to a particular wavelength band and therefore normally have relatively high visibility and high levels of protection.  Each system is different however for PDT that uses red lasers and other therapeutic red laser systems then either the LG-006, LG-006N and LG-004 may work well depending on the specifics of the system.

http://www.lasersafetyglasses.com.au/lg-006-red-la...

http://www.lasersafetyglasses.com.au/lg-006n-red-l...

http://www.lasersafetyglasses.com.au/lg-004-635nm-...

A lower cost option or if a broad range of LED wavelengths need to be protected against, then broadband glasses such as the LG-011 and LG-011N are options.  These protect against red, blue, green and infrared wavelengths with relatively low levels of attenuation of between 10-30X.  This option is ok for low power LED systems however have the draw back of low visibility due to covering a large wavelength range.

http://www.lasersafetyglasses.com.au/lg-011-new-im...

http://www.lasersafetyglasses.com.au/lg-011n-opera...

To talk with one of our experts about your specific requirements please email us at info@dioptika.com or call us on 1300 411 337.