Iris volume before and after pupillary dilation using ultrasound biomicroscopy

H. Ishikawa, R. Ritch, S. T. Hoh, J. M. Liebmann, David Greenfield, Y. Uji

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose. To evaluate changes in iris cross-sectional area and iris volume using ultrasound biomicroscopy (UBM). Methods. Patients were imaged before and after pupillary dilation. Images were exported to an IBM-compatible PC in PCX format. Iris volume and cross-sectional area were then measured using an automated software program of our own design capable of calculating iris volume with axial alignment using keratometry and corneal diameter. Results. 10 patients were enrolled (mean age, 45.5 ±19.0 yrs; mean refractive error, -2.4 ± 3.6 D; mean axial length, 24.1 ±1.6 mm). Mean iris volume was 41.21 ±2.64 mm3 before dilation and 35.88 ±3.92 mm3 after dilation (p=0.009, paired tTest) (12.5 ±11.4 % reduction). Cross-sectional iris area was 2.31 ±0.26 mm2 before dilation and 1.51 ±0.22 mm after dilation (p<0.0001, paired t-Test) (33.8 ±13.2 % reduction). Conclusion. Iris volume and cross-sectional iris area decrease with dilation. The decrease in iris volume represents loss of fluid from the stroma.

Original languageEnglish
JournalInvestigative Ophthalmology and Visual Science
Volume38
Issue number4
StatePublished - Dec 1 1997
Externally publishedYes

Fingerprint

Acoustic Microscopy
Iris
Dilatation
Refractive Errors
Software

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Iris volume before and after pupillary dilation using ultrasound biomicroscopy. / Ishikawa, H.; Ritch, R.; Hoh, S. T.; Liebmann, J. M.; Greenfield, David; Uji, Y.

In: Investigative Ophthalmology and Visual Science, Vol. 38, No. 4, 01.12.1997.

Research output: Contribution to journalArticle

Ishikawa, H. ; Ritch, R. ; Hoh, S. T. ; Liebmann, J. M. ; Greenfield, David ; Uji, Y. / Iris volume before and after pupillary dilation using ultrasound biomicroscopy. In: Investigative Ophthalmology and Visual Science. 1997 ; Vol. 38, No. 4.
@article{82f8d34de8734759941d9e7121e3f8a3,
title = "Iris volume before and after pupillary dilation using ultrasound biomicroscopy",
abstract = "Purpose. To evaluate changes in iris cross-sectional area and iris volume using ultrasound biomicroscopy (UBM). Methods. Patients were imaged before and after pupillary dilation. Images were exported to an IBM-compatible PC in PCX format. Iris volume and cross-sectional area were then measured using an automated software program of our own design capable of calculating iris volume with axial alignment using keratometry and corneal diameter. Results. 10 patients were enrolled (mean age, 45.5 ±19.0 yrs; mean refractive error, -2.4 ± 3.6 D; mean axial length, 24.1 ±1.6 mm). Mean iris volume was 41.21 ±2.64 mm3 before dilation and 35.88 ±3.92 mm3 after dilation (p=0.009, paired tTest) (12.5 ±11.4 {\%} reduction). Cross-sectional iris area was 2.31 ±0.26 mm2 before dilation and 1.51 ±0.22 mm after dilation (p<0.0001, paired t-Test) (33.8 ±13.2 {\%} reduction). Conclusion. Iris volume and cross-sectional iris area decrease with dilation. The decrease in iris volume represents loss of fluid from the stroma.",
author = "H. Ishikawa and R. Ritch and Hoh, {S. T.} and Liebmann, {J. M.} and David Greenfield and Y. Uji",
year = "1997",
month = "12",
day = "1",
language = "English",
volume = "38",
journal = "Investigative Ophthalmology and Visual Science",
issn = "0146-0404",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "4",

}

TY - JOUR

T1 - Iris volume before and after pupillary dilation using ultrasound biomicroscopy

AU - Ishikawa, H.

AU - Ritch, R.

AU - Hoh, S. T.

AU - Liebmann, J. M.

AU - Greenfield, David

AU - Uji, Y.

PY - 1997/12/1

Y1 - 1997/12/1

N2 - Purpose. To evaluate changes in iris cross-sectional area and iris volume using ultrasound biomicroscopy (UBM). Methods. Patients were imaged before and after pupillary dilation. Images were exported to an IBM-compatible PC in PCX format. Iris volume and cross-sectional area were then measured using an automated software program of our own design capable of calculating iris volume with axial alignment using keratometry and corneal diameter. Results. 10 patients were enrolled (mean age, 45.5 ±19.0 yrs; mean refractive error, -2.4 ± 3.6 D; mean axial length, 24.1 ±1.6 mm). Mean iris volume was 41.21 ±2.64 mm3 before dilation and 35.88 ±3.92 mm3 after dilation (p=0.009, paired tTest) (12.5 ±11.4 % reduction). Cross-sectional iris area was 2.31 ±0.26 mm2 before dilation and 1.51 ±0.22 mm after dilation (p<0.0001, paired t-Test) (33.8 ±13.2 % reduction). Conclusion. Iris volume and cross-sectional iris area decrease with dilation. The decrease in iris volume represents loss of fluid from the stroma.

AB - Purpose. To evaluate changes in iris cross-sectional area and iris volume using ultrasound biomicroscopy (UBM). Methods. Patients were imaged before and after pupillary dilation. Images were exported to an IBM-compatible PC in PCX format. Iris volume and cross-sectional area were then measured using an automated software program of our own design capable of calculating iris volume with axial alignment using keratometry and corneal diameter. Results. 10 patients were enrolled (mean age, 45.5 ±19.0 yrs; mean refractive error, -2.4 ± 3.6 D; mean axial length, 24.1 ±1.6 mm). Mean iris volume was 41.21 ±2.64 mm3 before dilation and 35.88 ±3.92 mm3 after dilation (p=0.009, paired tTest) (12.5 ±11.4 % reduction). Cross-sectional iris area was 2.31 ±0.26 mm2 before dilation and 1.51 ±0.22 mm after dilation (p<0.0001, paired t-Test) (33.8 ±13.2 % reduction). Conclusion. Iris volume and cross-sectional iris area decrease with dilation. The decrease in iris volume represents loss of fluid from the stroma.

UR - http://www.scopus.com/inward/record.url?scp=4243731016&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243731016&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:4243731016

VL - 38

JO - Investigative Ophthalmology and Visual Science

JF - Investigative Ophthalmology and Visual Science

SN - 0146-0404

IS - 4

ER -