A Photochromic Copolymer Hydrogel Contact Lens: From Synthesis to Application

Figure 7

(a) Loaded salicylic acid amount in hydrogels for three times in different media, (b) salicylic acid release behavior in different media for first drug-loading, (c) salicylic acid release behavior in different media for second drug-loading, and (d) salicylic acid release behavior in different media for third drug-loading.

(a)

(b)

(c)

(d)