Advantages of transition lenses:
They are convenient. You can use these glasses in most cases, whether indoors or outdoors;
They provide continuous UV protection. You will never forget your sunglasses and no need to travel outside.
They don't get lost easily. When you do n’t have two pairs to track, you and your child are less likely to lose their glasses;
They are available in a variety of styles and colors to meet most people's prescription needs. If you need drop-resistant lenses, bifocals, progressive lenses or have other special needs, photochromic lenses are almost certainly available for you.
Disadvantages of transition lenses:
Depending on the brand, they will darken and lighten. Some people also take longer to change. Discuss your needs and options with an eye care professional;
They take longer to adjust in cold weather;
They do not darken in the car, and the car glass has a certain UV protection function to prevent darkening of photochromic lenses. Some lenses are designed to help solve this problem;
Today's advanced high-quality glasses with photochromic lenses may not be a splurge, but a wise solution for many. Think about whether they fit your lifestyle.