All are true for Tear substitutes Or Artificial tears except:

A Hyaluronic acid has much greater retention times than celluloses or polyvinyl alcohols.
B Artificial tears or ocular lubricants are generally formulated as solutions consisting of inorganic ions (0.9% NaCl) and polymers to increase wettability and retention time.
C Polyacrylic acid (carbomer) is a gel that is hydrophilic, helping it to form a stable tear film, andincreases retention time.
D Commonly used polymers include polyvinyl alcohol and semisynthetic celluloses.

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