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C. M. Hutnik, IV, A. Zhou, J. Giroux, A. Mao; Effect of Cataract Surgery on Intraocular Pressure and Anterior Chamber Angle. Invest. Ophthalmol. Vis. Sci. 2009;50(13):2466.
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© ARVO (1962-2015); The Authors (2016-present)
To determine if pre operative anterior chamber angle morphology captured by the anterior segment OCT-Visante can be a predictor of change in intra ocular pressure change following cataract surgery.
A new commercially available 1310 nm infrared anterior segment OCT system was used to image and evaluate anterior chamber dimensions. 53 eyes of 53 patients underwent 90 and 180 degrees of imaging both pre- and six months post temporal clear corneal phacoemulsification cataract extraction and intraocular lens implantation. The Student t test was used for comparisons between pre- and postoperative measurements of the AC angle and IOP. Multivariate logistic regression analysis was used for development of a prediction rule.
51 eyes were included in the pre- and post-IOP evaluation. Time interval between cataract surgery and last postoperative IOP measure was a minimum of six months. A mean postoperative IOP was obtained where possible. Mean age was 71.89 years with 32 females and 21 males. The average pre op IOP was 15.13 +/- 3.09 mmHg with an average postoperative IOP of_12.78 +/- 2 mmHg. Postoperative IOP was statistically significantly lower than preoperative IOP (p <0.0001). Mean pre surgical anterior chamber angle was 24.72° +/- 7.06 with mean postoperative anterior chamber angle 38.13° +/- 6.03. To develop the prediction rule, success was defined as ≥ 20% IOP reduction from the baseline preoperative IOP measurement. The average of preoperative OCT angle measurements was calculated for each subject. Multivariate logistic regression analyses did NOT identify any independent predictor significantly associated with ≥ 20% IOP reduction.
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