Final answer:
When posing features, the eyelids should: convey the intended expression and be proportionate to the facial features. They should also be realistically capable of performing their biological function, such as blinking and clearing away dust particles.
Step-by-step explanation:
When posing features, particularly in the context of portraiture or figurative art, the eyelids should convey the intended expression and balance with the rest of the facial proportions.
LibreTexts™ mentions that the proportions of the face are similar from person to person, yet unique for each individual.
Therefore, the position and shape of the eyelids play a critical role in depicting the subject's mood and character.
For example, slightly drooping eyelids can express weariness or introspection, while wide-open eyes can show surprise or keen attention.
From a functional perspective, the eyelids protect and clear the eye. This biological function suggests that, in realistic portrayals, the eyelids should appear capable of closing and opening appropriately.
In dynamic art, to capture the gaze of the subject effectively, it's important that the eyes, including the eyelids, should be aligned with the tear ducts, and the space between the eyes should be approximately as wide as one eye.
In summary, the artist must carefully consider the form and function of the eyelids to create a compelling and realistic portrayal, paying attention to both the aesthetic and the anatomical aspects of the eyes.