While the inner surface and contents of the immediate container (i.e. bottle) are sterile, the outer surface of the bottle is not sterile. The use of the bottle in a sterile field should be avoided. BETADINE* 5% Sterile Ophthalmic Prep Solution is used as follows: BETADINE* 5% Sterile Ophthalmic Prep Solution is used as follows: Make sure container is intact before use. To open, COMPLETELY TWIST OFF TAB, do not pull off. Gently pour entire contents of bottle into a sterile prep cup. Saturate sterile cotton-tipped applicator to prep lashes and lid margins using one or more applicators per lid, repeat once. Saturate sterile prep sponge or other suitable material to prep lids, brow and cheek in a circular ever-expanding fashion until the entire field is covered, repeat prep three times.