Transition lenses, also known as photochromic lenses, are eyeglass lenses that automatically adjust their tint based on the lighting conditions. They are clear indoors and darken when exposed to sunlight or ultraviolet (UV) rays, effectively functioning as both regular glasses and sunglasses in one pair

How Transition Lenses Work

These lenses contain tiny molecules of silver halide and chloride embedded within them. When exposed to UV light, a chemical reaction causes these molecules to change shape and absorb light, darkening the lenses to a sunglasses tint. When the lenses are no longer exposed to UV light, the molecules revert to their original state, and the lenses become clear again. The darkening process typically takes about 30 seconds, while returning to clear can take 2 to 5 minutes, influenced by temperature and other factors

Benefits of Transition Lenses

• Convenience: They eliminate the need to switch between prescription glasses and sunglasses.
• UV Protection: They provide 100% protection against UVA and UVB rays both indoors and outdoors.
• Blue Light Filtering: Many transition lenses also filter harmful blue-violet light from the sun and digital screens, reducing eye strain and potential damage.
• Improved Visibility: By reducing glare and adjusting tint automatically, they enhance visual comfort and reduce eye fatigue

Types of Transition Lenses

There are various types designed for different needs, including:

• Everyday lenses that quickly adjust for general use.
• Specialized lenses like Transitions XTRActive, which darken inside cars and offer extra protection from bright light and glare.
• Polarized photochromic lenses that combine tinting with polarization for enhanced glare reduction

In summary, transition lenses are adaptive eyeglass lenses that darken in sunlight to protect your eyes and lighten indoors for clear vision, offering a practical and protective solution for people who wear glasses full-time