Imagem janeiro 28, 2026 janeiro 28, 2026

Canetas a laser na lista de armas?

DOI: 10.37039/1982.8551.20260004

A 35-year-old man presented to the ophthalmology clinic with immediate blurry vision and central scotoma in the right eye after sustaining accidental exposure to a handheld laser pointer (power < 1 mW, wavelength 640 to 660 nm; according to the label on the device) from approximately 5 m away, for a duration that he described as 1 to 2 seconds during a PowerPoint presentation in a conference room. Visual acuity was 20/80 in the right eye and 20/20 in the left eye. Color fundus photograph showed loss of foveal reflex with well-circumscribed elevated yellow-orange spot at the foveola (, black arrow) encircled by faint grey coloration in the right eye. Optical coherence tomography (OCT) of the right macula revealed a focal hyperreflectivity at the fovea in a vertical orientation with disruption of the retinal pigment epithelium (hyporeflective cavitations inside the retinal pigment epithelium and photoreceptor segments at the fovea (, white arrow).

The right eye was diagnosed with a laser pointer induced photic maculopathy. Photic maculopathy is a type of retinal photochemical injury caused by ultraviolet radiation due to solar eclipse viewing, direct sun gazing, arc welder gazing or laser pointer exposure, as in this case. Handheld lasers are generally safe for human eyes if the users have general awareness of its potential hazards and knowledge of safe handling. The Food and Drug Administration (FDA), as such, regulates the sale of handheld laser limited to Class II or IIIa lasers with outputs of a maximum of 5 mW and wavelengths between 635 and 750 nm.⁽⁾ However, handheld lasers ranging from 5 mW to 500 mW (class IIIa) or greater than 500 mW (class IV) are readily available online or at street markets, with some even being sold with incorrect labeling to lower class compared to their actual high-power output. Direct ocular exposure to such handheld device with lasers of power more than 5 mW and shorter wavelength (green and blue laser; wavelength 490 to 575 nm) may lead to retinal damage. Although visual recovery can occur over a period of months, central scotoma or metamorphopsia may be permanent in some cases.⁽⁾

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