Abstract #80683 Published in IGR 20-3

Changes in choroidal area following trabeculectomy: Long-term effect of intraocular pressure reduction

Kojima H; Kojima H; Hirooka K; Sonoda S; Sakamoto T; Kiuchi Y
PLoS ONE 2019; 14: e0209145

See also comment(s) by Tae-Woo Kim

PURPOSE: To evaluate changes in the macula and peripapillary choroidal area at one year after trabeculectomy in order to determine the effect of intraocular pressure (IOP) changes. METHODS: This prospective longitudinal study examined 30 eyes of 30 patients with glaucoma that was uncontrolled by medical therapy. At 1 day before and at 1 year after the trabeculectomy surgery, macular and peripapillary choroidal images were recorded by enhanced depth imaging optical coherence tomography (EDI-OCT). Luminal and interstitial areas were converted to binary images using the Niblack method. Factors influencing the macular choroidal and peripapillary area were examined by multivariate analysis. RESULTS: After trabeculectomy, the mean IOP was 10.8±3.2 mmHg compared to 17.8±7.2 mmHg at baseline (P < 0.001). The total macular choroidal area after the surgery increased from 317,735±77,380 to 338,120±90,700 μm2, while the interstitial area increased from 108,598±24,502 to 119,172±31,495 μm2 (all P < 0.05). The total peripapillary choroidal area after the surgery also increased from 1,557,487±431,798 to 1,650,253±466,672 μm2, while the interstitial area increased from 689,891±149,476 to 751,816±162,457 μm2 (all P < 0.05). However, there were no significant differences observed in the luminal area before and after the surgery. A decrease in the IOP was among the factors associated with the changes in the peripapillary choroidal area. CONCLUSIONS: IOP reductions after trabeculectomy led to increases in the macular and peripapillary choroidal areas for at least 1 year postoperative. Increases in the interstitial areas were the primary reason for observed changes in the choroidal area after trabeculectomy.

Department of Ophthalmology, Kagawa University Faculty of Medicine, Kagawa, Japan.

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12.8.1 Without tube implant (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
2.12 Choroid, peripapillary choroid, peripapillary atrophy (Part of: 2 Anatomical structures in glaucoma)

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