Choosing a corrective lens can be related to an ordinary experience, because the choice can be perceived as undifferentiated. Indeed, what looks more like a corrective lens than another corrective lens? However, choosing the lens that will best suit you needs real expertise from your Eye Care Professional. This expertise relies on three fundamental elements: • Knowledge of your visual defect and the way to correct it • Knowledge of your lifestyle (professional activities, leisure activities, etc) • Knowledge of corrective lenses (features and benefits) The recommendation of a corrective lens is complex. Your vision is unique and the lenses that correct it are custom made. With billions of possible combinations, only one will be perfectly suited to your individual needs. A corrective lens, beyond its appearance and the fact that it is custom made, can integrate highly sophisticated levels of technology. A corrective lens is a complete system defined by three dimensions: • The correction (what the lens corrects) • The materials (what the lens is made of) • The lens treatments (what protects the material and optimizes its performance) The higher the level of performance from the combination of dimensions, the better the performance of the lens.