Systemic Oxidative Stress Level as a Pathological and Prognostic Factor in Myopic Choroidal Neovascularization.

PURPOSE

To investigate the association of systemic oxidative stress level with myopic choroidal neovascularization (mCNV) and its clinical outcomes.

DESIGN

Retrospective case-control study.

PARTICIPANTS

This retrospective study included 52 eyes of 52 healthy participants (mean age: 62.5 years), 30 eyes of 30 patients (mean age: 59.6 years) with high myopia (HM) but without mCNV, and 23 eyes of 23 patients (mean age: 61.8 years) with HM and mCNV who received intravitreal anti-VEGF antibody injections (IVIs) using a pro re nata regimen during the 6-month follow-up after the first IVI.

METHODS

Clinical findings, including oxidative stress parameters, such as diacron reactive oxygen metabolites (dROMs), biological antioxidant potential (BAP), and the BAP/dROM ratio (B/d ratio), were analyzed.

MAIN OUTCOME MEASURES

Clinical features and oxidative stress parameters.

RESULTS

Both BAP and the B/d ratio were significantly lower in the HM/mCNV group than in the HM/no mCNV group ( = 0.002 and  = 0.012, respectively) and than in the control group ( = 0.001 and  = 0.026, respectively). In a multiple logistic regression analysis, axial length (odds ratio 1.878,  = 0.042) and the B/d ratio (odds ratio 0.470,  = 0.026) were significantly associated with mCNV. Dividing the patients into high and low B/d ratio groups (with a cutoff of 5.2) showed that subfoveal choroidal thickness (SFCT) was lower ( = 0.002) and the number of IVI treatments was higher ( = 0.029) in the low B/d ratio group than in the high B/d ratio group. In multiple regression analyses, only the B/d ratio was significantly associated with SFCT (β = 0.684,  = 0.006).

CONCLUSIONS

The oxidative stress level in eyes with HM differed according to mCNV, SFCT, and the number of IVI treatments. Measuring oxidative stress parameters might be useful in eyes with HM both for assessing the risk of developing mCNV and determining disease activity.

FINANCIAL DISCLOSURES

Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.