The evaluation and correlation of subfoveal choroidal thickness and macular hole apical and basal diameters with enhanced depth imaging optical coherence tomography in patients with idiopathic macular hole
Keywords:optical coherence tomography, OCT, enhanced depth imaging, EDI, macular hole, idiopathic macular hole, subfoveal choroidal thickness, choroid, apex, apical, base, basal, diameter, angle, vitrectomy, ILM, pars-plana, correlation, correlate, quantitative
Purpose: To investigate the evaluation and correlation between apical and basal hole diameters and subfoveal choroidal thickness (SCT) in patients with idiopathic macular hole (IMH), using enhanced depth imaging optical coherence tomography (OCT).
Methods: This cross-sectional study included 30 eyes of 30 patients with IMH and 30 healthy controls eyes. The SCT of subjects were measured using enhanced depth imaging OCT and the results were compared. In the IMH group, the mean horizontal apical and basal diameters of IMH were calculated and the correlation between mean apical and basal diameters and SCT were investigated. All patients with IMH underwent vitreoretinal surgery and the SCT at third postoperative month was compared with the preoperative values.
Results: The mean age and gender distributions of the groups were similar (p =0.082 and p =0.605). The mean SCT was 241.73 ± 57.20 μm in the IMH group and 280.30 ± 72.22 μm in the control group. The SCT of the IMH group was thinner than that of the control group (p =0.025). The mean apical and basal diameters of the IMH were 395.30 ± 190.71 μm and 920.70 ± 428.19 μm, respectively. There was a significant negative correlation between mean apical diameter and SCT of IMH (r =- 0.373, p = 0.042) and there was no significant correlation between mean basal diameter and SCT of IMH (r =-0.282, p = 0.131). The mean SCT was 237.19 ± 43.61 at the third postoperative month and there was no significant difference between the postoperative and preoperative values of the IMH group (p =0.555).
Conclusion: The SCT is thinner in IMH patients than that of healthy subjects, and there is a statistically-significant negative correlation between the apical hole diameter and SCT. In the early stage (three-month postoperative) after anatomical closure of IMH with vitreoretinal surgery, the SCT does not change significantly.
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