<prompt> Which dye is best used for defining corneal erosions and ulcers?Lissamine greenIndocyanine greenRose BengalFluorescein  <response>: 1.Fluorescein - fluorescein impregnated strips used Uses Corneal staining to detect abrasion and ulcers. Lacrimal tests includes tear film break up time , Janes test for watering eye. Seidels Test. To detect leakage of aqueous from AC 2. Lissamine green stains degenerated and dead cells -used in ocular surface disorders -Eg keratoconjunctivitis 3. Indocyanin green lCG has a high protein binding capacity Used in Fundus angiography - for disorders involving choroidal vasculature ICG-enhanced anteriorposterior capsulorrhexis - childhoodadult cataract with no fundus glow. 4. Rose bengal1 is used for staining of margins of dendritic ulcers 