A comprehensive resource for safe and responsible laser use
US: UPDATED - Wash. state man charged with lasing ferry; ordered to pay $100,000 fine
The almost six-month delay was due in part because the crime took place in waters between jurisdictions, making it more complex to determine who would prosecute.
Raden has previously been in trouble for misusing a laser. In July 2015, Raden and his friend Dillon Reisman, 27, were aiming a laser into house windows in Langley, Washington, in order to “cause alarm to anyone trying to sleep.” When confronted by police, Raden repeatedly aimed the laser beam into an officer’s face. Felony charges were not filed until November 18 2015.
In yet another incident, police said Raden was accused of using a laser and acid as weapons.
UPDATED - May 2 2016: The U.S. Coast Guard issued a civil penalty of $100,000 against Raden on April 26 2016. According to a Coast Guard press release, “Coast Guard officials are seeking civil penalties for violation of a safety and security zone as well as interference with the safe operation of the Tokitae while it transited between Mukilteo and Clinton. The final civil penalty amount will be determined by a Coast Guard Hearing Officer in Arlington, Va.” The text of the press release is below (click on the “Read More…” link).
Click to read more...
Romania: Report of eye injury from Class 4 laser
The injured person is from Romania. He was hit in the left eye for 1 second or less from a distance of about 2 feet (~60 cm). He saw a dot in the center of his left eye and could not read properly with that eye. He went to an eye doctor who said there was a small retinal burn. After four days he said the vision improved a bit. He was scheduled for a follow-up exam one month after the injury date.
He asked LaserPointerSafety.com about any possible outcome and treatment. Experts we consulted said his symptoms and vision will probably improve. They suggested a non-steroidal anti-inflammatory drug (NSAID) such as ibuprofen or indomethcin. More aggressive treatment such as steroids (orally or injected into the eye) have been done with “often good” results. The side effects of steroids should be considered. They also indicated that the follow-up examination is important.
The laser was marked “<3000mW”, “Wavelength 532nm +/-10” and “Class IIIb Laser Product”. The label is incorrect, since Class IIIb is between 5 and 500 mW. A laser that is in the thousands of milliwatts would be Class 4.
The laser appears to be a “JD-303” from China; a link is here. The cost is US $5-7 per laser in a minimum order of 30 pieces. (They can supply up to 20,000 lasers per week.) It has a nominal power of 1 watt. The Alibaba web site does say “This is not a toy for your children, this is a high intensity laser pointer for adults only!”
Excerpt from the webpage for the laser believed to have caused the injury
Thanks to Leon McLin and Bruce Stuck for their assistance in this case.
US: Child suffers eye injuries from adult misusing high-powered blue laser
The case was reported in JAMA Ophthalmalogy under the title “Ocular Safety of Recreational Lasers.” Authors Glenn Yiu, Sujit Itty and Cynthia Toth are with the Department of Ophthalmology at Duke University Medical Center in Durham, North Carolina.
They described the boy’s injuries as being caused by a Spyder III Pro Arctic “a class 4, high-powered 1250 mW laser that is manufactured from the 445 nm blue diode of a dismantled home theater projector and that is commercially available for online purchase from overseas.” This brand of laser is manufactured by the company Wicked Lasers; an 800 mW version was reviewed here.
In the case they described, “the adult directed the laser at the child’s eyes in jest, unaware of the harmful consequences.”
A copy of the safety label that appears on a Wicked Laser Spyder III Pro Arctic, containing the IEC and U.S. FDA-mandated wording for a Class 4 laser: “Avoid eye or skin exposure to direct or scattered radiation”
According to the authors, “imaging studies suggest that the laser damage was limited to superficial retinal vessels with no involvement of the underlying retinal pigment epithelium or choroid. To our knowledge, this is the first report of a continuous wave laser in the visible spectrum–damaging retinal vessels without affecting the retinal pigment epithelium, the site where damage from visible lasers typically occurs.”
They speculate that this may be caused by greater absorption of shorter wavelength lasers by hemoglobin, or a defocusing of the laser due to chromatic aberration and myopia in a child.
The authors conclude that “with the expanding use of lasers in nonoccupational or recreational settings, escalation of laser safety awareness and consumer laser regulations is paramount to prevent future ocular laser injuries.”
From JAMA Ophthalmology, published online January 09, 2014. doi:10.1001/jamaophthalmol.2013.5647. Thanks to Dr. David Hunter for bringing this to our attention.
World: Hobbyist injures self with 1 watt blue laser
(UPDATE March 14 2012: The hobbyist reported “I still have the blind spot, and was effectively told by the ophthalmologist that it would probably be there the rest of my life. That doesn't bother me TOO much, since it isn't very inhibiting.”)
.Click to read more...
US: Injury reported from Casio-sourced 630mW diode
More than two weeks after the accident, he reports “... there are no identifiable irregularities. I am certain there is permanent damage in the spot, but it is so far out in [my] peripheral vision, that it is just not noticeable. So I have officially ceased worrying about it. Lesson learned.”Click to read more...