Photochromic or Transitions lenses are prescription glasses which become darker when you’re in the sun and clear when you’re inside. A chemical reaction in the lens causes them to darken when they’re exposed to sunlight.
The biggest benefit is the convenience of not having to constantly change between clear glasses and sunglasses.
Photochromic lenses give you constant protection from all or the majority of harmful UV rays. This helps to reduce sun exposure (particularly incidental exposure), which can contribute to eye conditions including cataracts. They also help reduce eye strain caused by changing light conditions.
Photochromic lenses are particularly beneficial for children as their eyes are especially sensitive to UV rays.
No. Photochromic lenses are ideal for quicker trips in and outside, but if you’re spending a lot of time in the sun prescription sunglasses offer much better protection.
Prescription glasses are usually smaller than sunglasses and don’t cover enough of the eyes. Larger frames and wraparound sunglasses provide the best coverage and protection from UV rays.
Transitions lenses often aren’t as dark as sunglasses, which affects the amount of visible light to be filtered.
You can buy sunglasses with a photochromic tint in them, which can darken in particularly bright conditions.
You can have photochromic lenses made in your prescription single vision, progressive and bifocal glasses. You can also add an anti-reflective coating to the photochromic lenses too.
Technology has come a long way. You can now find photochromic lenses in a range of colours to suit your lifestyle and your look. As well as polarised photochromic lenses, to not only help with sunlight but also to reduce glare.