Effects of refractive accommodation on subfoveal choroidal thickness in silicone oil-filled eyes

Authors：Yan, Ying; Liu, Ran; Gao, Chengyuan; Song, Yanping; Ding, Qin; Chang, Feng; Chen, Xiao^*

Source：BMC Ophthalmology, 2022, 22(1): 107.

DOI：10.1186/s12886-022-02332-y

• Choroidal vascularity index
• Optical coherence tomography
• Silicone oil
• Subfoveal choroidal thickness

Purpose To investigate the effects of refractive accommodation on subfoveal choroidal thickness (SFCT) in silicone oil (SO)-filled eyes. Methods This retrospective, self-comparative study was conducted on 40 patients with unilateral macula-on rhegmatogenous retinal detachment, who underwent vitrectomy and SO tamponade. The SFCT of SO-filled eyes and the fellow control eyes were measured using optical coherence tomography at their one-month visit after surgery. The patients wore soft contact positive lenses for 24 h in the SO-filled eyes, to correct their refractive error. SFCT and choroidal vascularity index (CVI) were measured before and after wearing the contact lenses. Mean SFCT was compared between SO-filled eyes and the fellow control eyes, and SFCT and CVI were compared before and after refractive error correction in the SO-filled eyes. Results Mean SFCT of SO-filled eyes (221.52 +/- 38.41 um) was less than that of the fellow eyes (273.41 +/- 31.30 um) (P < 0.001). After refractive error correction, the mean SFCT increased to 269.28 +/- 36.90 um(P < 0.001). However, CVI decreased from 57.01 +/- 2.41 to 55.39 +/- 2.39 (P < 0.05). Conclusions SFCT reduction in SO-filled eyes was primarily due to the hyperopia status. The non-uniform change in CVI suggests that changes in CT are mainly attributed to a greater expansion of the stromal area instead of the choroidal vascular area.

• Institution
  南方医科大学