Use Of Laser Pointer Research Articles

BODIPY dyes for optical limiting applications on the nanosecond timescale.

Since 2017, the Institute for Nanotechnology Innovation at Rhodes University has studied the optical limiting properties of boron dipyrromethene (BODIPY) dyes with respect to high-intensity nanosecond timescale laser pulses. Concerns over the irresponsible use of laser pointers in the context of aviation safety have provided a need for materials that can readily transmit light under ambient conditions while rapidly attenuating intense incident laser pulses. The structural flexibility of the BODIPY chromophore facilitates the red shift of the main BODIPY spectral band that typically lies at ca. 500 nm to the red end of the visible and the near-infrared through the introduction of vinylene groups at the 3,5-positions or an aza-nitrogen atom. Research carried out in this context is described, and possible future directions are discussed.

Public exposure to artificial optical radiation in the aesthetics and the entertainment sector in Greece. Risk management actions.

Safety issues are raised from the use of low- and high-power optical radiation sources, both laser and non-laser, by non-experts for aesthetic and entertainment purposes. The Greek Atomic Energy Commission relied on the ISO 31000:2018 framework to manage the public exposure risk to such cases. Risk was evaluated as (1) intolerable for lasers and intense pulsed light sources at aesthetic procedures and in the case of laser pointers, (2) severe for lasers at laser shows and (3) moderate for light-emitting diodes (LEDs) at aesthetic procedures, home-use intense pulsed light sources/LEDs and laser/LED projectors. Operators' training, public awareness campaigns, intensive market surveillance actions and the enhancement of the regulatory framework have been proposed as risk treatment/control measures and have been prioritised in this order, according to their effectiveness in reducing the exposure risk and their urgency of implementation. The Greek Atomic Energy Commission developed public awareness campaigns regarding exposure safety to laser and non-laser light sources at aesthetic procedures and the use of laser pointers.

Maculopatía fótica: revisión de la literatura (I)

The human retina, as transducer of light energy, is especially exposed to light toxicity. Solar maculopathy has been the only form of photic maculopathy for millennia, often secondary to the observation of an eclipse. During the last century, technological advances have led to the appearance of new forms of photic maculopathy, related to the exposure to new forms of artificial light, such as welding devices and lasers. In recent years, the general use of laser pointers has led to an upturn in interest in this pathology. The aim of this review is to offer an integrated view of the different types of photic maculopathy. Due to the extension of this topic, the review is presented divided into two parts. In this first part solar maculopathy and welding arc maculopathy are presented.

Maculopatía fótica: revisión de la literatura (ii)

The human retina, as transducer of light energy, is especially exposed to light toxicity. Solar maculopathy has been the only form of photic maculopathy for millennia, often secondary to the observation of an eclipse. During the last century, technological advances have led to the appearance of new forms of photic maculopathy, related to the exposure to new forms of artificial light, such as welding devices and lasers. In recent years the general use of laser pointers has led to an upturn in interest in this pathology. The aim of this review is to offer an integrated view of the different types of photic maculopathy. Due to the extension of the topic, the review is presented divided into 2 parts. In this second part, atomic bomb maculopathy, laser maculopathy, iatrogenic forms of photic maculopathy, and foveomacular retinitis are presented.

A case of macular hole formation by high-power laser pointer

Laser pointers are omnipresent. They are used in many spheres of life, e.g. education, medicine, industry, entertainment, and military. The number of reports of eye injury caused by laser pointers when used improperly is growing. We report a case of a 23-year-old man who had a full-thickness macular hole in the left eye after using an inappropriately high powered laser pointer. The patient was treated successfully with 23-gauge pars plana vitrectomy. This case underlines the importance of careful and correct use of laser pointers because of the vision-threatening dangers induced by mishandling these gadgets.

Early changes in optic coherence tomography in a child with laser pointer maculopathy

Abstract Case report A 9-year-old boy referred due to visual loss in his right eye after playing with a laser pointer. In the first visit (12 h later) visual acuity (VA) was 0.15. A hypopigmented lesion was present in the fovea, and optic coherence tomography (OCT) showed vertical hyper-reflective bands. In the last visit (6 months later), VA had improved to 0.5, and OCT showed a well-defined area of outer retinal layer disruption. Discussion An inadequate use of laser pointers can induce severe and permanent visual loss.

Retinal Injury Secondary to Laser Pointers in Pediatric Patients

This case report describes 4 male children (age, 9-16) who had laser-related retinal injury to the macula of 1 eye or both eyes due to the mishandling of the laser pointer devices at a single vitreoretinal clinical practice. The presenting symptoms associated with laser pointer injury include central vision loss, central scotoma, and metamorphopsia. Clinical findings of laser-related retinal injury include reduced visual acuity, disruption of the photoreceptor ellipsoid zone, retinal pigment epithelium atrophy, and choroidal neovascular membrane formation. Disruption of the foveal ellipsoid zone (photoreceptor inner segment/outer segment layer) is the most common finding on optical coherence tomography imaging. Three patients had potential irreversible vision loss. Laser pointers are readily available and appropriate use of laser pointers in the pediatric population must be emphasized due to the potential irreversible retinal injury. Health professionals, school teachers, and parents should raise public awareness of this emerging public health issue by educating children about the dangers of laser pointers. Laser pointer devices among children should be discouraged and limited due to the possibility of permanent harm to themselves and others. Legislation and laws may be required to better control the sale and use of these devices.

Cambios precoces en la tomografía de coherencia óptica en un niño con maculopatía inducida por puntero láser

Case reportA 9-year-old boy referred due to visual loss in his right eye after playing with a laser pointer. In the first visit (12hours later) visual acuity (VA) was 0.15. A hypopigmented lesion was present in the fovea, and optic coherence tomography (OCT) showed vertical hyper-reflective bands. In the last visit (6 months later), VA had improved to 0.5, and OCT showed a well-defined area of outer retinal layer disruption. DiscussionAn inadequate use of laser pointers can induce severe and permanent visual loss.

Bilateral macular injury from a green laser pointer

We report the case of a 13-year-old boy who had a bilateral macular injury after playing with a green laser pointer for a duration of 1 minute. Clinical examination revealed a decrease in visual acuity and macular injury in both eyes, and imaging investigations revealed a bilateral macular lesion due to exposure to the laser pointer. At 3 months’ follow up, visual function had improved but remained partially impaired. This case emphasizes the importance of cautious and appropriate use of laser pointer devices because of the potential vision-threatening hazards induced by mishandling of these devices.

Laser Pointers: Low-cost, Low-tech Innovative, Interactive Instruction Tool

This paper discusses the use of laser pointers at the Engineering and Physical Sciences Library, University of Maryland, College Park, as a personal response system (PRS) tool to encourage student engagement in and interactivity with one-shot, lecture-based information literacy sessions. Unlike more sophisticated personal response systems like clickers, laser pointers are low-cost and low-tech, but comparable in increasing student engagement.

Enhancing Interaction in Architectural Presentations with Laser Pointers

In a common meeting environment with projector-and-screen settings, the discussion may be dominated by a presenter who has the control of the content displayed. Although frequently used for architectural discussions, this digitally-engaged setting may not be optimal in its support of participation and discussion of design ideas. This paper presents a novel use of laser pointers to enhance the interaction in architectural presentations. A laser pointing system designed for a projector-and-screen environment was developed. To compare the performance of the laser pointer with other interaction devices, a controlled user study was carried out to test the efficiency of different devices in point-and-selection interactions. The usability of the system was also tested in a design critique. These two tests show that laser pointer is useful and able to encourage participation in group discussions. Details of the laser pointing system, the experiments and the results are reported in this paper.

Optical Absorbance Measurement of Pure Water by the Use of Laser Pointers : Development of Teaching Material for the Principle of the Color of Water

Optical Absorbance Measurement of Pure Water by the Use of Laser Pointers : Development of Teaching Material for the Principle of the Color of Water

A laser-aligned method for anthropometry of hands

We have developed a laser-aligned measuring device to facilitate the measurement of linear hand dimensions. Our objective has been to make a simple, clinically applicable device for anthropometry of the hands in patients with arthritis in order to guage the progression of hand deformities. The system provides an alternative to the use of rules, tapes, photogrammetry and least-squares devices which have previously been applied to hand measurements. The system delivers results which are not significantly different from those measured with rules and callipers and has a similar level of accuracy. The use of laser pointers for alignment facilitates measurements which necessitate picking the highest point of the hand. The device is portable and simple to use in the clinic. We have used it to measure hand dimensions in normal subjects and patients with arthritis. However, the system could equally well be used to facilitate measurement of other objects with an irregular surface profile.