9B01.3

ICD-11 MMS 2026-01

Iris sphincter disorders

Description

This refers to disorders of the muscle in the part of the eye called the iris. It encircles the pupil of the iris, appropriate to its function as a constrictor of the pupil.

Index terms

  • Iris sphincter disorders
  • Congenital mydriasis
  • Spastic miosis of iris sphincter
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  • Aberrant regeneration of iris sphincter
  • Damage to the iris sphincter due to acute angle closure glaucoma
  • Damage to the iris sphincter due to pigmentary dispersion syndrome
  • Damage to the iris sphincter due to herpes zoster or herpes simplex infection

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
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  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes
  • 8A21.0 – Posterior cortical atrophy

Sibling codes

  • 9B01.0 – Physiologic anisocoria
  • 9B01.1 – Parasympathoparetic pupils
  • 9B01.2 – Pharmacologic inhibition of the parasympathetic pathway
  • 9B01.4 – Pharmacologic parasympathicotonic pupils
  • 9B01.5 – Pharmacologic sympathoparetic pupils
  • 9B01.6 – Sympathotonic pupils
  • 9B01.7 – Episodic unilateral mydriasis
  • 9B01.Y – Other specified disorders of the efferent pupillary system
  • 9B01.Z – Disorders of the efferent pupillary system, unspecified

Foundation entity

Iris sphincter disorders – http://id.who.int/icd/entity/433190248

Allowed postcoordination axes

Part of: 9B01: Disorders of the efferent pupillary system › 09: Diseases of the visual system