Final answer:
Entropion is the term for a condition in which the eyelid is rolled inward against the eyeball, typically caused by muscle spasm or inflammation or scarring of the conjunctiva. It can lead to irritation, excess tearing, and damage to the cornea if left untreated.
Step-by-step explanation:
The term for a condition in which the eyelid is rolled inward against the eyeball, typically caused by muscle spasm or inflammation or scarring of the conjunctiva, is Entropion (option a).
Entropion can be caused by age-related changes in the eyelid muscles or by trauma to the eye or eyelid. It can lead to irritation, excess tearing, and damage to the cornea if left untreated.
An example of a condition related to entropion is trichiasis, which occurs when the eyelashes turn inward and irritate the eye.