In the nineteen-nineties, there was much hype in the European media about presumed laser pointer maculopathy. However, the recent introduction of more powerful and therefore more dangerous laser pointers and their easy availability on the internet necessitates vigilance on the issue. This is an urgent matter, as here we report three cases of proven maculopathy due to an unsafe laser pointer. Three boys aged 13, 9 and 12 years used an unsafe laser pointer as a toy and looked repeatedly into the pointer, resulting in a permanent reduction in visual acuity due to macular damage. Laser pointers are not designed to be children's toys or instruments to annoy people in a crowd. Health authorities and the ophthalmic community should be aware of the potential danger of improper use of high-output laser pointers and warn the general public before the widespread availability of unsafe laser pointers and consequently laser pointer-induced macular damage becomes a true social problem.
Download full-text PDF |
Source |
---|
RSC Adv
December 2024
Department of Chemistry, Faculty of Science, Tokyo University of Science 1-3 Kagurazaka Shinjyuku-ku Tokyo 162-8601 Japan
A novel photochromic system was discovered, in which leucomethylene blue, reduced by l-ascorbic acid, was irradiated with 405 nm visible light, resulting in the solution undergoing a colorless-to-blue transition. The process was then repeated, with the solution returning to its colorless state when left undisturbed. This photochromic reaction is sensitive enough to be driven by a blue-violet LED lamp and enables figures to be drawn in solution with a laser pointer.
View Article and Find Full Text PDFElectrophoresis
December 2024
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an JiaoTong University, Xi'an, People's Republic of China.
On-line counting of the microparticle/bacteria in the liquid medium has great potential in the food safety and biomedical fields. A new low-cost microfluidic device is proposed for the on-line counting of the microparticles/bacteria in the liquid medium. The gradually contracted microchannel and the viscoelastic fluid are combined to achieve the efficient elastic focusing of the particle/bacteria, which significantly improves the counting accuracy by aligning all particles/bacteria in a single position at the center of the microchannel.
View Article and Find Full Text PDFSleep Breath
November 2024
Department of Clinical Neurophysiology and Neurology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey.
Purpose: This study aimed to compare cervical proprioception and related biomechanical factors among patients with Obstructive Sleep Apnea (OSA) and asymptomatic controls.
Methods: In this case-control study, polysomnography scores (apnea-hypopnea index-AHI) were examined to determine the disease severity of the OSA group. Also, we evaluated cervical proprioception by using a laser pointer to detect joint repositioning error sense in cervical rotational movements.
J Bodyw Mov Ther
October 2024
University of Tehran, Faculty of Physical Education and Sport Science, Department of Sport Injury and Corrective Exercise, Tehran, Iran.
Purpose: The presence of spinal arches is crucial for maintaining good body posture, reducing pressure on joints, and preventing deformities caused by misalignment. Engaging in exercises that focus on correcting body alignment, such as walking backward, can enhance posture and various related factors.
Method: A group of 46 female students suffering from forward head posture was selected (age: 22.
Acta Med Philipp
October 2023
Department of Otolaryngology - Head and Neck Surgery, College of Medicine and Philippine General Hospital, University of the Philippines Manila.
Background And Objective: The COVID 19 pandemic has changed the way the human anatomy is taught. A necessary shift towards online instruction, combined with a decrease in cadaver donation has resulted in the need for maximizing formalinized, soft-embalmed, computerized, and plastinated cadaver specimens. Task-oriented activities allow students to demonstrate acquired knowledge and skills.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!