Polyhexamethylene biguanide (PHMB) eye drops Ophthalmic specials are often manufactured by specials manufacturers and hospital pharmacies.

Please explain the best way to measure the calculated answer using the provided apparatus,please explain in detail  

Polyhexamethylene biguanide (PHMB) eye drops Ophthalmic specials are often manufactured by specials manufacturers and hospital pharmacies. These include specialist products such as unlicensed antibiotic or antifungal ocular preparations or formulations without preservatives. For the summative session, you will be required to manufacture a polyhexamethylene biguanide (PHMB) 0.02% w/v preservative free eye drop for a patient with acanthamoeba keratitis. Today’s date 10 ml polyhexamethylene biguanide 0.02% w/v preservative free eye drops Instil 1 drop to the left eye every hour as directed Summative Aseptics Lab 6 The following equipment/materials are available: bottle containing 200mg of PHMB in 10 ml sodium chloride 0.9% w/v 2 x 10 ml bottles of sodium chloride 0.9% w/v 2 x 10 ml bottles 1 x 10 ml eye drop bottle 1 eye dropper cap Gilson pipette calibrated to 4.5 ml Gilson pipette calibrated to 1.0 ml Polyhexamethylene 1 x 10 mL 1 x 10 mL biguanide Sodium chloride Sodium chloride 200 mg/ 10 mL 0.9% w/v 0.9% w/v Gilson pipette 2 x 10 mL Bottles Gilson pipette calibrated to 1.0 mL calibrated to 4.5 mL