Analysis of Biometric Anterior Chamber Parameters Using Scheimpflug Imaging and IOP After Laser Cataract Surgery in Hyperopic Eyes

Schroeder, Anne

Analysis of Biometric Anterior Chamber Parameters Using Scheimpflug Imaging and IOP After Laser Cataract Surgery in Hyperopic Eyes

Sunday, April 19, 2015: 1:06 PM

Room 5B (San Diego Convention Center)

Anne M. Schroeder, MD

David M. Tremblay, MD

George O. Waring IV, MD, FACS

Purpose
To study the effect of laser-assisted cataract surgery on the Iridocorneal angle, anterior chamber depth, and anterior chamber volume using Scheimpflug imaging as well as intraocular pressure in hyperopic eyes.

Methods
Twenty eyes with > +1.50 D hyperopia underwent laser-assisted cataract surgery and IOL implantation. Anterior segment parameters including iridocorneal angle (ICA), anterior chamber depth (ACD), and anterior chamber volume (ACV) were measured pre and postoperatively using Scheimpflug imaging. Intraocular pressure was measured pre and post-operatively. A paired t-test was used to compare pre and post-operative values of ICA, ACD, ACV, and IOP.

Results
In this interim analysis (N=8 eyes), laser-assisted cataract surgery in hyperopic eyes significantly increased ICA, ACD, and ACV and significantly reduced IOP. Mean preoperative values: ICA 22.5° (13.1-34.9°, ±8.2); ACD 1.9mm (1.4-2.2mm, ±0.3); ACV 92.3mm³ (50.0-125.0mm³, ±25.6); IOP 21.8mmHg (15-33mmHg, ±7.1). Mean post-operative values: ICA 42.2° (36.0-51.5°, ±7.5); ACD 3.8mm (3.17-4.36mm, ±0.4); ACV 158.5mm³ (139.0-170.0mm³, ±11.6); and mean IOP was 15.75mmHg (12-20mmHg, ±3.1). Absolute difference between means: ICA 19.7°; ACD 1.9mm, ACV 66.3mm³, and IOP 6.0mmHg. All AC parameters were found to be statistically significant (p<0.0001) as was IOP change (p<0.5). Complete sample analysis will be reported.

Conclusion
Laser-assisted cataract surgery in hyperopic eyes significantly increased the ICA, ACD, and ACV and significantly reduced IOP.