Contact lens product

A contact lens product, comprising:

• a multifocal contact lens made of a silicone hydrogel, comprising:
• a central region;
• and
• at least one annular region concentrically surrounding the central region, wherein a diopter of the annular region is different from a diopter of the central region, and the annular region closest to a periphery of the multifocal contact lens is a first annular region;
• and
• a buffer solution, wherein the multifocal contact lens is immersed in the buffer solution, and the buffer solution comprises a cycloplegic agent;
• wherein a composition for manufacturing the silicone hydrogel comprises 2-hydroxyethyl methacrylate and 3-methacryloyloxypropyltris(trimethylsilyloxy)silane;
• wherein a weight percentage concentration of the 2-hydroxyethyl methacrylate in the composition for manufacturing the silicone hydrogel is 0.05% to 25%, and a weight percentage concentration of the 3-methacryloyloxypropyltris(trimethylsilyloxy)silane in the composition for manufacturing the silicone hydrogel is 0.1% to 40%;
• wherein a weight percentage concentration of the cycloplegic agent in the buffer solution is ConA, the diopter of the central region of the multifocal contact lens is PowC, a maximum diopter of the first annular region of the multifocal contact lens is PowP1, a diameter of the central region of the multifocal contact lens is DiC, an outer diameter of the first annular region of the multifocal contact lens is DiP1, and the following conditions are satisfied:
• ConA<0.5%;
• 2.25 D≤|PowC−PowP1|;
• −5.50 D≤PowP1≤−0.50 D;
• 2 mm<DiC;
• and
• 0.15≤DiC/DiP1≤0.64.