Subfoveal choroidal thickness in ipsi- and contralateral eye
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A Study was conducted to compare subfoveal choroidal thickness (SFCT) and associated clinical variables in patients with carotid stenosis (CS) before and 6 months after carotid endarterectomy (CEA).

The prospective non-randomized Helsinki Carotid Endarterectomy Study – Brain and Eye Sub-sTudy included seventy patients and 40 control subjects. Ophthalmological examination included SFCT measured with enhanced-depth imaging-optical coherence tomography. Carotid stenosis (CS) was more severe ipsilateral to the CEA than contralaterally.

Results:
--At baseline, patients had thinner mean SFCT than control subjects in both eyes.

--At follow-up, SFCT did not change in ipsi- and contralateral eyes compared to baseline in patients.

--Patients with coronary artery disease had thinner mean SFCT versus those without it in ipsilateral eyes before CEA (200 versus 233 microm).

--In ipsilateral eyes of patients before CEA, thinner SFCT and ocular signs of CS, plaque and hypoperfusion related findings combined, were associated, and the best-corrected visual acuity, measured in logMAR, increased with increasing SFCT.

Finally, subfoveal choroidal thickness (SFCT) is smaller in people with CS, but there is no link between SFCT and the severity of the condition. The fact that the choroidal arteries in severe CS did not change after CEA shows that they are unable to respond to increased blood flow. Another symptom of CS could be an SFCT that is narrow on both sides.

Source: https://onlinelibrary.wiley.com/doi/10.1111/aos.14648?af=R
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