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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


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).


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


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.


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).


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.

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