Tonic pupil, right eye

This code signifies Adie's tonic pupil affecting the right eye. It is characterized by a pupil that is larger than the contralateral pupil, reacts poorly to light, but constricts slowly and incompletely to accommodation (near vision). This condition results from damage to the parasympathetic innervation of the iris sphincter muscle.

Use this code when documentation clearly indicates a diagnosis of tonic pupil specifically affecting the right eye. This diagnosis is typically made based on clinical examination findings, including pupillary light reflex testing and near-far dissociation. Supporting documentation would include ophthalmology notes detailing pupillary abnormalities and the affected eye.

• Ensure the laterality (right eye) is explicitly documented to support this specific code.
• Do not confuse with other pupillary abnormalities like anisocoria without tonic features or Horner's syndrome.
• If both eyes are affected, separate codes for each eye (H57.051 and H57.052) or the bilateral code (H57.053) should be used as appropriate.