<p>The first step to administer Trypan Blue is to inject an air bubble into the anterior chamber using a 26 gauge needle. It prevents dilution of dye by the aqueous humor. Then Trypan Blue is injected into the anterior lens capsule using a tuberculin syringe. Sufficient staining is achieved as soon as the dye has contracted the capsule. If some area is left unstained, inject one more drop till it gets stained.</p>