Any significant refractive error is corrected by the prescription of glasses. Sometimes the squint is completely straightened when glasses are worn but more often the control is partial, the glasses simply acting to reduce the angle of the squint. Glasses can be prescribed in a child as young as six to nine months if really necessary. It is important that the parents have a full understanding of the need to wear glasses if adequate supervision is to be expected. When the spectacles are removed at bedtime, a previous squint might appear to become even worse and the parents should be warned about this possible rebound effect.

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