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Choroidal thickness measurement in highly myopic eyes using SD-OCT
Leila El Matri1, Mejda Bouladi, Ahmed Chebil
1Department B of Ophthalmology, Hedi Rais Institute of Ophthalmology, Tunis, Tunisia. Leila.elmatri@rns.tn
Summary
Highly myopic eyes exhibit thin choroids that thin further with age and myopia. Choroidal thickness may influence the development of choroidal neovascularization (CNV).
Area of Science:
- Ophthalmology
- Retinal Imaging
- Choroidal Imaging
Background:
- Macular choroidal thickness (CT) is a key indicator in ocular health.
- Understanding CT variations in high myopia is crucial for disease management.
- Choroidal neovascularization (CNV) is a sight-threatening complication.
Purpose of the Study:
- To measure macular choroidal thickness (CT) in highly myopic eyes using spectral-domain optical coherence tomography (OCT).
- To investigate correlations between CT and age, myopia severity, and history of choroidal neovascularization (CNV).
Main Methods:
- A cross-sectional study of 187 highly myopic eyes.
- Spectral-domain OCT was used for high-resolution choroidal imaging.
- Choroidal thickness measured from retinal pigment epithelium to sclera.
Main Results:
- Mean subfoveal CT was 100.71 ± 59.98 μm.
- CT showed negative correlation with age and refractive error (P < 10⁻³).
- Eyes with CNV history had significantly thinner choroids (55.45 ± 24.46 μm; P < 10⁻³).
Conclusions:
- Highly myopic eyes have thin choroids, which thin further with age and myopia.
- Reduced choroidal thickness in high myopia may be a risk factor for CNV.
- The choroid's role in CNV pathogenesis warrants further investigation.
