After an eclipse, it is tempting to put your glasses in a drawer and forget them until the next one. Before you reuse them, check their origin, age and condition. A pair that looks tidy is not automatically suitable for another solar viewing session.
When can eclipse glasses be reused?
The American Astronomical Society's current guidance permits reuse when viewers are less than 10 years old, have been tested by a properly accredited laboratory for conformity with ISO 12312-2, and have undamaged filters that remain securely attached. Read and follow the instructions supplied with your pair.
Keep the packaging, manufacturer details and purchase record together. If you cannot establish what the viewer is or resolve questions about its age and condition, contact the supplier before considering reuse. Our guide to checking eclipse-glasses documentation explains what to ask for.
Inspect before every viewing session
NASA advises inspecting viewers before use and discarding any that are scratched, torn or otherwise damaged. Check both filters and their attachment to the frame. Replace a viewer if the filters are punctured, loose or damaged; do not try to restore it with tape or glue.
Make this a separate preparation step before gathering your group outdoors. Set aside the viewers you are unsure about so that they cannot be handed out by mistake. Looking dark or having a shiny surface does not establish compliance.
Store them clean, dry and protected
AAS recommends room-temperature storage in the original packaging, a case, an envelope or another container that protects against dirt, moisture, scratches and punctures. Keep the instructions with the viewers and avoid placing heavy items on top.
Follow the manufacturer's cleaning directions. AAS advises against water, glass cleaner, solvents or other liquids on cardboard viewers; avoid wet wipes. If dirt or damage cannot be resolved as instructed, replace the viewer.
Repeat the viewing routine, too
Supervise children and make sure everyone understands the supplied instructions. Eclipse glasses must never be used to look through binoculars, telescopes or cameras. Ordinary sunglasses are unsuitable for direct solar viewing. Consult NASA's guidance for the specific eclipse phase you will observe.
Preparing for another event? Check every pair before counting your usable stock. If you need replacements, compare the QW-SOZ 4-pack and black plastic frame 3-pack, or browse all QIWEI solar eclipse glasses.
Cover image: AI-generated storage illustration. The box and accessories illustrate a storage idea and are not a statement of package contents.