Iris Shadow Test

Last Updated on Fri, 13 Apr 2018 | Physical Examination

Iris. At the same time, inspect each iris. The markings should be clearly defined. With your light shining directly from the temporal side, look for a crescentic shadow on the medial side of the iris. Since the iris is normally fairly flat and forms a relatively open angle with the cornea, this lighting casts no shadow.

Occasionally the iris bows abnormally far forward, forming a very narrow angle with the cornea. The light then casts a crescentic shadow.

Iris Shadow Physical Exam

In open-angle glaucoma—the common form of glaucoma—the normal spatial relation between iris and cornea is preserved and the iris is fully lit.

This narrow angle increases the risk of acute narrow-angle glaucoma— a sudden increase in intraocular pressure when drainage of the aqueous humor is blocked.

Pupils. Inspect the size, shape, and symmetry of the pupils. If the pupils are large (>5 mm), small (<3 mm), or unequal, measure them. A card with black circles of varying sizes facilitates measurement.

Miosis refers to constriction of the pupils, mydriasis to dilation.

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Responses

  • Annalise
    How to do iris shadow test?
    7 years ago
  • asmait
    How diagnose iris shadow?
    2 years ago
  • kayla duncan
    How to check iris shadow with torch?
    2 years ago
  • stephen
    How to see iris shadow using torch light?
    2 years ago
  • Robert
    How to examine iris shadow?
    2 years ago
  • jessica vogler
    How to perform shadow test?
    2 years ago
  • miniya yonatan
    How to check iris shadow by torch light?
    2 years ago
  • silvia
    How to do shadow test in external examination?
    2 years ago
  • albertino
    Is iris shadow seen in fatatact?
    1 year ago
  • giusy
    How to check iris shadow in cataract?
    1 year ago
  • zula
    Does iris shadow seen in normal person?
    1 year ago
  • JARNO
    Why is iris shadow formed?
    1 year ago
  • jenni holkeri
    How to elicit iris shadow?
    1 year ago
  • Rosa
    How to do shadow test in glaucoma?
    1 year ago
  • amaranth
    How to chek iris shadow?
    10 months ago
  • abdullah
    Where is iris shadow fotmed?
    10 months ago
  • sonja noronen
    How to perform iris shadow test?
    10 months ago

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