Transitions is a manufacturer of photochromic lenses, which adjust depending on lighting conditions. Transitions lenses make it easy to have prescription eyeglasses and sunglasses in one, and help to reduce eyestrain from sunlight. Transitions is a coating applied to the lenses during creation and comes in various color and shades. Transitions lenses should last as long as your prescription.
Visit your local optical office, preferably where you purchased the lenses.
Check with the office for a lens warranty. Most optical offices offer warranties on Transitions lenses. This may entitle you to a free or discounted lens replacement. If you recently purchased your glasses and the Transitions aren't working, it may be because of a laboratory error. In this case, most offices replace the lenses at no charge.
Buy new lenses. Transitions coatings are integrated into the lenses during production, affecting the overall functionality of the lenses. When they begin to wear and tear, the recommended option is to replace the lens entirely.