Eye Care

Transition Lenses

Transition Lenses

Transitions® glasses automatically adapt to changing light conditions. Responding to the light around you, they intelligently change from clear to dark when you go outdoors and back to clear when you return inside.

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how to measure pupillary distance pd

How To Measure Pupillary Distance (PD)

What Is Pupillary Distance (PD)? A personalized fit starts with measuring your pupillary distance - that's the space between the centres of each of your pupils. The pupillary distance is measured in millimetres and tells the lens maker where to put the optical centre on each lens. Note that if your...

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