Hi Carol,
Yes, every eye is different. This is the case no matter what the ethnicity or race of the person. You’ll likely notice that every “Caucasian” eye is very different from the next also. This is why it is important to observe your subject closely. There isn’t a drawing formula that fits every eye, therefore the ethnicity of the subject is largely irrelevant. This video demonstrates a simple process of drawing an eye (any eye) using a specific order. This order of mark making can be applied to any eye you wish to draw from observation. The drawing created in this lesson is very generic and was not drawn from an observed subject.