The Jones dye test I and II are used to evaluate lacrimal drainage. A positive Jones I (fluorescein dye recovered from the nose within 2–5 minutes of instillation in the conjunctival sac) indicates:

• A Functional block of the nasolacrimal duct
• B Punctal stenosis preventing dye from entering the canaliculus
• C Dacryocystitis with pus filling the lacrimal sac
• D Normal patent lacrimal drainage system with adequate lacrimal pump function ✓

Explanation

Jones Dye Test I: 2% fluorescein is instilled in the conjunctival sac and the nose is examined with a cotton swab or nasal endoscope after 2–5 minutes. Recovery of dye (positive test) indicates a patent, functioning lacrimal drainage system with normal pump function. Absence of dye (negative Jones I) indicates either anatomical obstruction or functional block. Jones II then differentiates: if dye is recovered after irrigation through the puncta, there is a functional block; if clear irrigation fluid is recovered, there is anatomical obstruction.

Reference: Khurana Comprehensive Ophthalmology, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.