Intensity of the flash associated with laser-induced plasma in the eye

Moseley, Harry; Allan, Donald

doi:10.1088/0031-9155/32/9/009

Cited by 10 publications

(6 citation statements)

References 9 publications

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“…The lack of abnormality in the fluorescein angiography indicates that the lesion was not caused by direct action of the laser but, probably, by the laser induced plasma flash (8) . A similar case has been reported by Yang et al (9) , as in Yang's report, the injury observed seems to be caused by radiation emitted by the plasma (10) . However, unlike in Yang's case, in our case the patient was wearing protective goggles and the lesion was less severe.…”

Section: Discussionsupporting

confidence: 86%

Functional impairment with minimal macular damage in femtosecond laser plasma injury: case report

Freitas¹,

Moreno-Perdomo²,

Gentil³

et al. 2013

Arq. Bras. Oftalmol.

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Section: Discussionsupporting

confidence: 86%

Functional impairment with minimal macular damage in femtosecond laser plasma injury: case report

Freitas¹,

Moreno-Perdomo²,

Gentil³

et al. 2013

Arq. Bras. Oftalmol.

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“…2 The formation of plasma created by tightly focusing of femtosecond laser beams generally presents as a bright flash of blue-white light and emits light radiation harmful to retinal structures. 4 Similar to our previous case, prolonged light exposure, a short distance to the plasma source as well as disuse of protective goggles are the three main factors that contribute to the macular damage in this case series. However, unlike the monocular retinal injury in our past report, both eyes were affected in all three patients in this case series.…”

Section: Discussionsupporting

confidence: 85%

“…2 It has been demonstrated that viewing the plasma flash in a patient's eye through the microscope in clinical practice would not be considered hazardous to the operator. 4 However, during technical procedures, prolonged viewing of a laser-induced plasma flash formed in the air can result in photic retinopathy, as described in the present case series. In this situation, eye protection including a neutral filter adequate to reduce glare as well as the conventional laser eye protection specified at the laser wavelength is recommended.…”

Section: Discussionmentioning

confidence: 48%

“…Although the use of femtosecond laser devices has become common in the field of ophthalmology, the retinal injury caused by femtosecond laser‐induced plasma is a rare entity since the effective radiation on the retina is minimal in the case of a momentary exposure 2 . It has been demonstrated that viewing the plasma flash in a patient's eye through the microscope in clinical practice would not be considered hazardous to the operator 4 . However, during technical procedures, prolonged viewing of a laser‐induced plasma flash formed in the air can result in photic retinopathy, as described in the present case series.…”

Section: Discussionmentioning

confidence: 99%

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Case series of photic maculopathy associated with exposure to a plasma flash induced by a femtosecond laser

et al. 2022

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Background and Objectives: Photic maculopathy resulting from laser-induced plasma flash has been rarely reported, and the corresponding mechanism of the injury is still unclear. We present a case series of three patients with bilateral macular injuries produced by exposure to the plasma radiation from femtosecond laser tightly focusing. Study Design/Materials and Methods: Funduscopic findings were accompanied mainly by optical coherence tomography (OCT) investigation of the macula during the follow-up period. Results: All patients shared similar clinical symptoms soon after the initial injury, including reduced visual acuity and central scotomas. It was acutely characterized by foveolar yellowish faceted lesions upon fundus examination. The main OCT finding in the acute stage was a hyper-reflective area involving all foveolar retinal layers without retinal edema. Repeat OCT evaluation during the latter stages revealed that the retinal changes were reversible, but delineated mild pathology at the outer foveal retina. This retinal structural recovery was accompanied by improvements in visual acuity and central scotomas as well. Conclusions: Prolonged viewing of a plasma flash induced by a focused femtosecond laser without eye protection may produce persistent damage to the retina. We believe that a photochemical process similar to the mechanism of a solar burn or welder's maculopathy may cause retinal damage in this case series.

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“…6 E tal como neste, a lesão parece ter sido causada pela radiação emitida pelo plasma. 7 Acreditamos que um mecanismo fotoquímico semelhante a uma queimadura solar possa ter causado a lesão. Como acontece nas queimaduras solares, não se observam alterações na angiografia.…”

Section: Discussionunclassified

Comprometimento Visual com Dano Macular Mínimo numa Lesão Causada por Laser de Femtosegundo

Mendes¹,

Freitas²,

Gentil³

2016

Gaz Med

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RESUMODescrevemos o caso de um doente do sexo feminino com 26 anos de idade, com história de escotomas centrais bilaterais com 24 horas de evolução, os quais surgiram após a lesão com laser indutor de plasma por produção de nanopartículas. A avaliação oftalmológica incluiu a observação do fundo ocular em midríase, angiografia fluoresceínica e tomografia de coerência ótica.Numa primeira avaliação, a acuidade visual do olho direito era de 20/20 e do olho esquerdo 20/25. Observavam-se ainda alterações pigmentares foveais na mácula de ambos os olhos. Bilateralmente, a tomografia de coerência ótica revelou uma interrupção central da camada de fotorrecetores; a angiografia fluoresceínica foi normal. Nas avaliações subsequentes, a acuidade visual foi sempre de 20/20 bilateralmente. Os achados anormais observados na tomografia de coerência ótica desapareceram em menos de cinco meses, apesar das queixas subjetivas de escotomas no olho esquerdo se terem mantido. ABSTRACTThe authors describe the case of a 26-year-old female patient with a history of bilateral central scotomas which has lasted 24 hours, which appeared after an injury caused by a plasma laser for the production of nanoparticles. The ophthalmologic assessment including observing the ocular fundis in mydriasis, fluorescein angiography and optical coherence tomography (OCT).In a first assessment, the visual acuity of the right eye was 20/20 and the left eye was 20/25. Foveal pigmentary alterations were observed in the macula of both eyes. Bilaterally, the OCT revealed a central interruption of the photoreceptor layer; the fluorescein angiography was normal. In subsequent assessments, the visual acuity was always 20/20 bilaterally. The abnormal findings observed in the OCT disappeared in less than five months, despite continued subjective complaints of scotomas in the left eye.

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Intensity of the flash associated with laser-induced plasma in the eye

Cited by 10 publications

References 9 publications

Functional impairment with minimal macular damage in femtosecond laser plasma injury: case report

Functional impairment with minimal macular damage in femtosecond laser plasma injury: case report

Case series of photic maculopathy associated with exposure to a plasma flash induced by a femtosecond laser

Comprometimento Visual com Dano Macular Mínimo numa Lesão Causada por Laser de Femtosegundo

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