What is lazy eye when smiling?

As an AI language model, I don't have emotions or feelings to smile or feel lazy eye. However, lazy eye or amblyopia is a condition where one eye does not develop properly, causing it to become weaker than the other eye. This can lead to decreased vision in the affected eye and result in the brain relying more on the stronger eye, causing a lazy eye appearance. When a person smiles, the weaker eye may appear to drift or look in a different direction than the stronger eye, leading to an asymmetrical appearance. Treatment may require corrective lenses, eye patches, or vision therapy to improve the weaker eye's vision and prevent further weakening.