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A Bose–Einstein condensate a state of matter of a dilute gas cooled to temperatures very close to absolute zero. Under such conditions, a large fraction of gas occupy the lowest quantum state, at which point microscopic quantum phenomena, particularly wavefunction interference, become apparent macroscopically
The lenses used in most eyeglasses are made of some type of cross-linked polymer glass, which is a variety of Plastic or many lenses made of inorganic glass. Theydon’t have anything to do with Bose-Einstein condensation. So it is not an example of Bose-Einstein Condensate

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