This study evaluates the retinal vascular features using optical coherence tomography angiography in patients that have been affected by COVID-19.

To investigate the potential role of optical coherence tomography angiography in identifying the changes in retinal vessel density in patients that have been affected by COVID-19.

The optical coherence tomography angiography represents a noninvasive diagnostic technique that allows a detailed analysis of retinal vascular features.

Inclusion Criteria:

• age older than 18 years
• diagnosis of previous COVID-19
• absence of previous ocular surgery, congenital eye disease, high myopia (>6 dioptres), actual or previous diagnosis of glaucoma, optic disc anomaly, macular or vitreoretinal diseases.
• absence of significant lens opacities, low-quality OCT and OCT-A images.

Exclusion Criteria:

• age younger than 18 years
• absence of previous diagnosis of COVID-19
• presence of previous ocular surgery, congenital eye disease, high myopia (>6 dioptres), actual or previous diagnosis of glaucoma, optic disc anomaly, macular or vitreoretinal diseases.
• presence of significant lens opacities, low-quality OCT and OCT-A images.

The participans were older than 18 years with previous diagnosis of COVID-19. They did not present other ophthalmological diseases.