Final answer:
In the term keratoconjunctivitis, 'kerat(o)' refers to the cornea, and the condition represents inflammation of both the cornea and the conjunctiva, with serious instances possibly leading to blindness.
Step-by-step explanation:
In the term keratoconjunctivitis, the combining form kerat(o) means cornea. This term refers to the inflammation of both the cornea and the conjunctiva. Keratitis is the inflammation of the cornea, a condition that can arise from various causes, including infections, and can lead to symptoms like redness, irritation, blurred vision, and sensitivity to light.
Severe cases of keratitis can result in progressive corneal scarring, potentially leading to blindness. When inflammation is present in both the cornea and the conjunctiva, the condition is termed keratoconjunctivitis.
For example, herpes keratitis or herpetic keratitis affects both the conjunctiva and cornea, often caused by the herpes simplex virus (HSV-1), and can cause irritation, excess tears, and sensitivity to light. In such cases, laboratory testing is necessary to confirm the diagnosis, and antiviral medications may be prescribed.