Eclipse Eye Safety Guide

Why Is It Dangerous?

The Sun emits intense ultraviolet and infrared radiation that can burn the retina — a condition called solar retinopathy. This can cause permanent blind spots or vision loss. The danger is especially high during an eclipse because:

• The reduced light tricks your pupils into dilating, letting in more harmful radiation
• The retina has no pain receptors — you won't feel the damage happening
• Damage can be permanent and irreversible

Safe Viewing Methods

1. ISO-Certified Eclipse Glasses

The simplest and most popular method. Look for glasses with ISO 12312-2:2015 certification from a reputable manufacturer. See our recommended eclipse glasses.

2. #14 Welder's Glass

Shade #14 welder's glass (not lighter shades!) provides safe solar viewing. Available at welding supply shops. Heavier and less convenient than eclipse glasses but very effective.

3. Pinhole Projection

Poke a small hole in cardboard and project the Sun's image onto a flat surface behind it. Safe, free, and great for kids — but you're watching a projection, not the Sun directly.

4. Solar Telescopes/Binoculars

Specialized solar telescopes or binoculars with proper solar filters provide magnified views. Never use regular binoculars or telescopes without a front-mounted solar filter.

What Is NOT Safe

• Regular sunglasses (even very dark ones)
• Stacked sunglasses
• Smoked glass
• CDs or DVDs
• X-ray film
• Camera neutral density filters
• Unfiltered cameras, binoculars, or telescopes

During Totality (2026 & 2027 Total Eclipses)

During the brief period of totality — when the Moon completely covers the Sun — it is safe to look directly at the eclipse with naked eyes. This is the only time you can see the Sun's corona.

You must put your eclipse glasses back on before the Sun begins to reappear (the "diamond ring" effect signals totality is ending).