Experts advise safe DIY methods for viewing upcoming solar eclipse

Astronomers and eye-health specialists warned that looking directly at the Sun during the upcoming eclipse can cause retinal burns, even when the Sun is largely obscured by the Moon. Because certified eclipse glasses are in short supply, experts outlined alternative methods that allow the public to observe the event safely.

The recommended approach is to view a projected image of the Sun rather than the Sun itself. One method involves poking a small hole in a piece of cardboard and holding it up against the Sun while a white sheet of paper or a light-colored wall behind it displays the Sun’s silhouette, which will change as the eclipse progresses. A slightly more elaborate setup uses a pinhole in aluminum foil taped over a box opening, projecting the image onto paper inside the box.

Natural pinhole effects can also be observed through the gaps between tree leaves, interlaced fingers, or a kitchen colander, provided the observer keeps their back to the Sun. The experts cautioned against makeshift solar filters made from CDs, DVDs, medical X-rays, or stacked sunglasses, stating that such devices do not meet safety standards.

"Looking at the Sun without proper protection can damage the retina and may lead to permanent vision loss," a spokesperson for a leading eye-care organization said.

The guidance aims to help viewers enjoy the eclipse while avoiding the hazards associated with direct solar observation.