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Changes in anterior chamber angle after cataract surgery using fourier domain optical coherence tomography

Poster Details

First Author: A.Macarro Merino SPAIN

Co Author(s):    J. Fernandez-Vigo Escribano   C. Fernandez-Vigo Escribano   I. Sanchez Guillen   J. Fernandez-Vigo Lopez           

Abstract Details

Purpose:

To analyze the changes in the anterior chamber angle after cataract extraction using Fourier Domain optical coherence tomography (FD-OCT) measuring the trabecular-iris angle (TIA), angle opening distance (AOD) and trabecular-iris space area (TISA), and to study the correlation with the anterior chamber depth (ACD), axial length (AL) and intraocular pressure (IOP).

Setting:

International Center of Advanced Ophthalmology, Madrid, Spain. University of Extremadura. Ophthalmology department.

Methods:

Prospective study that includes 477 eyes of 327 patients with cataract, without any other ocular pathology. The angle parameters: TIA, AOD and TISA were measured through FD-OCT RTVue® (Optovue Inc.) in the nasal and temporal sectors at 500 and 750 microns from the scleral spur. The exploration was done before and 3 months after surgery. AL and ACD were measured using IOL Master® (Carl Zeiss, Meditec). Correlation between the change in the angle parameters and the rest of parameters measured as AL, ACD and IOP was studied. Statistical significance was set at p =0.02.

Results:

Mean age was 70.1±9.3 years, and 64.5 % were women. Preoperative temporal angle was narrower than nasal (p= 0.01). Preoperative nasal and temporal AOD500 increased from 537.9 ±224.2 and 487.3 ±253.4 microns to 762.3 ±186.5 and 752.4 ±214.5 microns respectively after surgery (p= 0.001). Preoperative nasal and temporal TISA500 also increased from 0.19±0.09 and 0.16±0.09 mm2 to 0.26 ±0.06 and 0.25 ±0.08 mm2 respectively after surgery. The increase of angle parameters was correlated with previous angle width and ACD, but no correlation was observed with AL (p= 0.001). IOP reduced from 16.8 ±4.4 to 14.2 ±3.9 mmHg after cataract extraction (p= 0.001).

Conclusions:

After cataract surgery the anterior chamber angle parameters as TIA, AOD and TISA increased significantly. This increase is correlated with preoperative angle width, ACD and IOP but no with AL. A significant reduction of IOP was observed after surgery.

Financial Disclosure:

NONE

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