Pupil size in relation to ultrasonic anterior chamber depth measurements in pseudophakic eyes.
The effect of pupil size on ultrasonically determined anterior-chamber depth was studied in vitro with the Storz Alpha 20/20 and with the Kretz ultrasonoscope at high and low system sensitivity. The traces were measured peak to peak and base to base; results were compared to anterior-chamber depth measurements with optical pachymetry. We conclude that when measuring anterior-chamber depth with ultrasound, the pupil must be fully dilated or reduced system sensitivity must be used and the traces measured peak to peak.
D000368:Aged; D000704:Analysis of Variance; D001035:Aphakia / Q000175:diagnosis* / Q000503:physiopathology; D005260:Female; D006801:Humans; D007498:Iris / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011680:Pupil / Q000503:physiopathology*; D014463:Ultrasonography