Millions of people across North America and Europe are preparing to view the upcoming celestial event on Wednesday, Aug. 12, when a partial or total solar eclipse sweeps across the globe, driving a surge in demand for certified solar eclipse glasses.
According to reports by Forbes, the Wednesday event will feature a total solar eclipse sweeping across Greenland, Iceland, and Spain, while a partial solar eclipse will be visible across much of Europe, all of Canada, and parts of the northeastern United States.
Viewers outside the narrow path of totality must use certified eye protection during every phase of the event. Standard sunglasses do not protect the human retina from permanent damage when looking directly at the sun, according to safety guidelines highlighted by Space.com.
Whether observers are planning to buy a fresh pair of viewers or rummage through desk drawers for gear left over from past celestial events, understanding how to secure and test proper equipment is essential as supply lines tighten in the final weeks before the eclipse.
Where to Buy Certified Eclipse Glasses
Retail demand for certified viewers traditionally spikes during the final two weeks before an eclipse, particularly across Europe where fewer local brick-and-mortar stores normally stock solar filters, according to Forbes. Shoppers looking for reliable inventory can check astronomy specialty shops, science museums, local observatories, and planetariums.
Prices for single pairs generally range between $2 and $5, or roughly £2 to £4, while multi-packs offer a lower cost per viewer. Major verified manufacturers supplying the market include American Paper Optics, Thousand Oaks Optical, Rainbow Symphony, and DayStar Filters in the United States, alongside Absolute Eclipse and Baader Planetarium, as noted by Forbes.
When purchasing online, the American Astronomical Society Solar Eclipse Task Force recommends consulting its curated list of authorized vendors to avoid counterfeit products. Space.com emphasizes that buyers should strictly look for viewers that comply with the ISO 12312-2 international safety standard for direct solar viewing. Observers should also ignore marketing claims of “NASA-approved” products, as the space agency does not officially endorse commercial brands.
Reusing Gear From Past Eclipses
Households that saved protective eyewear from the Great North American Eclipse on April 8, 2024, or the 2023 annular eclipse can likely reuse those items, provided the filters remain undamaged. Solar eclipse glasses do not expire simply from sitting in storage.
However, safety experts caution that wear and tear can compromise the lenses. Astronomer and eclipse chaser Dr. Tyler Nordgren advised in an interview with Forbes that viewers should inspect old glasses thoroughly.
"If you’ve got some left over from 2024, take them out, point them at a bright light bulb, and make sure there is no light coming through any pin pricks or scratches," Dr. Nordgren told Forbes, noting that the equipment lasts for several years with proper care.
Before putting on any previously used viewer, users should run through a quick physical checklist:
- Examine the lenses for scratches, punctures, creases, or tears.
- Shine a bright flashlight directly through the filter material from behind to check for hidden pinholes.
- Verify that the cardboard frames remain secure and that the filter material has not detached at the edges.
Anyone uncertain about the structural integrity of their eyewear should discard the pair immediately rather than risk retinal injury.
Global Viewing Scope and Regional Variations
The geographic reach of the August 12 event varies widely by region. In North America, the deepest partial phases will occur in eastern Canada, where St. John’s in Newfoundland and Labrador will see 53% of the sun obscured, according to Forbes. Other Canadian and U.S. cities will experience much smaller partial views, with Halifax seeing 31%, Québec City 24%, Boston 16%, and New York City approximately 10%.
In contrast, European observers will witness much larger partial and total phases. According to Space.com, the United Kingdom will experience its best solar eclipse since 1999, with the moon obscuring roughly 90% of the sun. Observers seeking a total solar eclipse must travel directly into the path of totality across Greenland, western Iceland, or northern Spain.
For those capturing the event with cameras, smart telescopes, or solar binoculars, specialized solar filters and viewing gear remain mandatory to prevent equipment damage and protect eyesight.