The ophthalmologist treating a child undergoing atropine therapy will carefully monitor the progress of visual acuity, ensuring that near acuity in the amblyopic eye can support near tasks. Allergic reaction to atropine is rare (less than 1%); uncommon systemic side effects may include dry mouth, flushing, fever, tachycardia, and irritability. The child may complain of light sensitivity. Parents should be alerted that the eye receiving the drops will have a fixed and dilated pupil, as shown in the left pupil in this photograph.