Fig 1.
Main components of prototype apparatus.
A–cooling fan. B–camera with lens. C–near-infrared transilluminator. D–near-infrared iris transillumination examination conducted by the author.
Fig 2.
Near-infrared iris transillumination image of the left eye of a healthy volunteer.
(A). The pupillary ruff can be seen as a narrow dark circular band at the pupillary margin (red arrow). For comparison a visible light image of the iris of the same eye can be seen (B).
Fig 3.
Result of superimposing a dark frame image with a near-infrared iris transillumination image.
Many hot pixels can be seen (typical hot pixel marked by red arrow). No hot pixels were detected within the transillumination defects nor the pupillary ruff.
Fig 4.
Flowchart of image analysis algorithm.
Fig 5.
Near infrared iris transillumination image of a patient with pigment dispersion syndrome (subject 1).
The iris is divided into four quadrants labeled as A,B,C and D respectively. Numerous bright spoke like iris transillumination defects are seen in the midperiphery of the iris in each quadrant. Aperture photometry measurements within the iris transillumination image can be seen (red circles) as well as their value.
Table 1.
Characteristics and results of patients examined in this study.