What is the purpose of fluorescein in ophthalmology?

• A. To measure eye pressure
• B. To find corneal abrasions
• C. To treat conjunctivitis
• D. To enhance night vision

Answer: (B)

Fluorescein is a vital diagnostic tool in ophthalmology, primarily utilized to find corneal abrasions. When applied to the surface of the eye, fluorescein dye highlights any damage to the cornea by staining areas where the epithelial layer is compromised. This allows healthcare providers to easily visualize and assess superficial injuries or defects on the cornea using a blue light filter, which makes the fluorescein glow.

Using fluorescein is crucial for detecting conditions like corneal abrasions, as these can lead to more severe complications if not properly treated. Other uses of fluorescein include examining the conjunctiva and assessing tear production, yet its primary role in identifying corneal damage is what makes it an essential component of ophthalmic examinations.