Syntax

Syntactic actants

Actant 1: whose eyelid it is
(a) Genitive
(b) Possessive
Веки девочки были воспалены. The girl's eyelids were inflamed.
Гримёр приклеил ресницы к её векам. The make-up man glued lashes to her eyelids.
NB When the word веко functions as a subject and does not have a descriptive modifier, the construction веко у + Genitive is often preferred to (a) and (b), above:
Веки у девочки были воспалены. The girl's eyelids were inflamed.

Restrictive modifiers

(a) adjectival modifier
(b) noun phrase: Adj + Genitive of глаз
(c) prepositional phrase: на + Adj + Locative of глаз
верхние/нижние веки the upper/lower eyelids
Верхние веки у девочки были воспалены. The girl's upper eyelids were inflamed.
NB Note that, unlike many other body parts that come in pairs, веко cannot be modified by the adjectives левое and правое:
веки левого глаза the left eyelids (upper and lower)
веки на левом глазу the (upper and lower) lids on the left eye
верхнее/нижнее веко на левом/ правом глазу the upper/lower lid of the left/right eye