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Choroidal and retinal blood flow changes in degenerative myopia
N Akyol1, A S Kükner, T Ozdemir
1Department of Ophthalmology, Firat University, School of Medicine, Elazig, Turkey.
Summary
Blood flow in the choroid and retina is reduced in degenerative myopia. This may be due to increased vascular resistance and adaptive changes in retinal blood flow.
Area of Science:
- Ophthalmology
- Vascular Biology
- Medical Imaging
Background:
- Degenerative myopia is associated with various ocular complications.
- Understanding blood flow dynamics is crucial for managing myopic retinopathy.
Purpose of the Study:
- To investigate changes in choroidal and retinal blood flow in patients with degenerative myopia.
- To compare blood flow parameters between myopic patients and healthy controls.
Main Methods:
- A case-control study was conducted involving patients with degenerative myopia and age-matched healthy emmetropic volunteers.
- Color Doppler ultrasonography was used to measure blood flow velocity and resistance indices in the posterior ciliary artery and central retinal artery.
Main Results:
- Patients with degenerative myopia exhibited significantly lower peak systolic and diastolic blood flow velocities in both the posterior ciliary artery and central retinal artery compared to controls.
- A significant difference in the posterior ciliary artery resistance index was observed between the groups, indicating increased vascular resistance in myopic patients.
Conclusions:
- Choroidal and retinal blood flow are decreased in degenerative myopia.
- Increased vascular resistance may contribute to reduced choroidal blood flow.
- Decreased retinal blood flow might represent an adaptive response in the context of myopia.