Conjunctivochalasis is usually bilateral, involving most commonly the inferotemporal conjunctiva, that may cause disruption of the inferior tear meniscus. It may present as loose superior conjunctiva, although it is less common.
The core idea seems clear enough. To say of something that it is socially constructed is to emphasize its dependence on contingent aspects of our social selves. It is to say: This thing could not have existed had we not built it; and we need not have built it at all, at least not in its present form.
Language and the conceptual schemes that are transmitted by means of language are essentially social phenomena. As a result, human cognitive structures are, Vygotsky believed, essentially socially constructed. Knowledge is not simply constructed, it is co-constructed.