How do you Transilluminate the iris?

Iris transillumination requires an undilated pupil and is created by making an axial light beam shine into the small pupil and reflect off the retina. The beam aperture should match the pupil size or be smaller than the pupil to avoid iris reflections.

What Transillumination means?

Transillumination is the shining of a light through a body area or organ to check for abnormalities.

What does iris Transillumination mean?

Bilateral acute iris transillumination (BAIT) is a recently defined disease characterized with bilateral acute, severe pigment dispersion of iris and pupil sphincter paralysis.

What causes iris transillumination defects?

Known causes of acquired iris atrophy with or without transillumination of the iris include herpetic iridocyclitis, pigment dispersion syndrome (PDS), pseudoexfoliation syndrome, Fuchs uveitis syndrome, Vogt-Koyanagi-Harada disease, trauma, and acute angle-closure glaucoma.

What is sinus transillumination?

Transillumination is a diagnostic technique in which a bright light is projected toward or through the area to be examined. The technique was first described for the diagnosis of sinus dis- ease in 1888.

How do you Transilluminate sinuses?

The maxillary sinuses may also be transilluminated by placing a light beam inside the patient’s mouth against the palate directed upward. Bright transmission of light suggests a normal air-filled sinus; absent light transmission suggests the presence of fluid.

What does increased pigmentation of the iris mean?

Increased iris pigmentation is due to increased synthesis of melanin in the melanocytes, Dr. Hara said. Careful observations were needed for other homogeneous color irides, such as blue or green or gray. A new method is needed to assess iris color change by pattern or intensity, he said.

How do you know if you have pigment dispersion syndrome?

One of the most important findings, are areas of the iris that have been rubbed thin. These are called transillumination defects and appear where the most mechanical contact takes place. This very subtle finding usually confirms the diagnosis of pigment dispersion syndrome.

How do you do a transillumination test for sinuses?

IV. Technique

  1. Place transilluminator at superior medial orbit edge. Light placed deep under each brow pointed upward. Cover light source with hand over patient’s eye. Shields light source from examiner.
  2. Observe for glow at anterior Frontal Sinus wall. Normal if dim red glow seen over frontal area. Compare both sides.

Why do we Transilluminate sinuses?

What is iris transillumination defects?

The disease has characteristics of bilateral enlargement of the corneal diameter and a deep anterior eye chamber, without an elevation in intraocular pressure. It can manifest with mild to moderate myopia as well as photophobia and iridodonesis (due to iris hypoplasia).