Apparatuses for drainage of degradable glaucoma capable of gradient control of scars and methods of making the same

An apparatus capable of gradient control of scars, configured for drainage of degradable glaucoma, comprising:

• a long-strip-shaped drainage sheet with a uniform overall cross-sectional size, wherein:
• the drainage sheet is made of a biodegradable material,
• an outer surface of the drainage sheet is provided with a drainage gap that penetrates through opposite sides of the drainage sheet, the outer surface of the drainage sheet is coated with a biodegradable surface coating, and
• the surface coating carries an anti-scarring drug, wherein the anti-scarring drug is configured to be gradually released as the surface coating degrades, a distribution concentration of the anti-scarring drug within the surface coating varies in a non-monotonic manner, the distribution concentration of the anti-scarring drug presents a distribution curve that, along a depth direction of the surface coating, first gradually decreases from a high point and then gradually increases, and reaches a highest point at a bottom of the surface coating.