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Bending of contact lenses

It is a tendency of contact lenses to bend due to internal or external forces. It occurs in both hard and soft contact lenses.

The bending happens with every blink of the eye – the eyelid pushes on the contact lens in its centre where it bends. The bending also occurs while applying the contact lenses or during dehydration of contact lenses. However, the material of contact lenses has its shape memory.

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