Ophthalmic Diagnostic Procedures

Preparation and Application of Fluorescein Dye

The American Academy of Ophthalmology recommends moistening a fluorescein strip with sterile nonpreserved saline and applying it to the inferior tarsal conjunctiva for fluorescein dye application 1
The proper application method involves moistening a fluorescein strip with sterile nonpreserved saline, applying it to the inferior tarsal conjunctiva, and allowing the patient to blink several times to distribute the dye 1, 2

The American Academy of Ophthalmology recommends using a slit-lamp biomicroscope with a cobalt blue filter for optimal visualization of fluorescein staining, and suggests using a yellow filter in conjunction with the cobalt blue filter for enhanced visualization 1, 3, 2
Mild fluorescein staining can be observed in normal eyes and may be more prominent in the morning, according to the American Academy of Ophthalmology 1, 2

Fluorescein staining patterns can indicate specific conditions, including:

Staining Pattern	Possible Condition
Diffuse corneal and conjunctival staining	Viral keratoconjunctivitis
Inferior corneal staining	Exposure keratopathy or blepharitis
Superior bulbar conjunctival staining	Superior limbic keratoconjunctivitis

The American Academy of Ophthalmology advises against using fluorescein-anesthetic combination drops as the anesthetic may affect test results 1, 3
The American Academy of Ophthalmology recommends considering alternative diagnostic approaches, such as lissamine green dye, for patients with a history of multiple allergies or previous mild reactions 3, 1, 2
The American Academy of Ophthalmology warns against assuming that topical fluorescein is completely safe in all patients, as systemic reactions can occur, although they are extremely rare with topical application 3

Fluorescein staining can be safely performed in patients experiencing pain with eye movements, as there are no contraindications related to eye movement pain in current ophthalmology guidelines 1, 2
The absence of staining with eye movement pain may direct diagnosis toward orbital or neurological causes, and mild fluorescein staining should be interpreted in context of the full clinical picture 2
The American Academy of Ophthalmology advises having emergency medications readily available, such as epinephrine, antihistamines, and corticosteroids, for patients with a history of multiple allergies or previous mild reactions 3