Six eye conditions distinguish health.
Great vascular curvature: the eyes have great vascular curvature.
U-shaped capillary: Right above, there is a U-shaped capillary dilation at the white of the eye.
Matchhead blood vessels: the red blood above the eyes is in the direction of black eyes, and the end looks like a point.
Spiral blood vessels: the white eyeball outside the eye is congested, and there are spiral blood vessels in the direction of dark circles.
Arched blood vessels: There are "arched" blood vessels under the eyes.
Parallel capillaries: There are two capillaries above the eyes that bend in the direction of dark circles.