The invention relates to the technical field of medical biomaterials. Cataract treatment becomes the ophthalmic clinical
attention focus and a main treatment means comprises combination of
lens extraction and artificial lens implantation. At present, the main clinical problem comprises
intraocular pressure increasing caused by a low
anterior lens capsule tear success rate and residual of a viscoelastic agent in the eye. The invention provides the preparation method of the ophthalmological viscoelastic agent with the selective
anterior capsule staining function. The preparation method comprises adding a
Trypan blue staining agent with a concentration of 0.002-0.6% into a material and carrying out high temperature and
high pressure sterilization. The use of the
staining agent does not change viscoelastic agent gel properties and an in-vitro release rate in 60min is about 15% so that the staining agent can be continuously and slowly released to an operation part so that
selective staining is realized and damage to tissue cells is prevented. Based on the characteristic, the viscoelastic agent can be effectively removed through staining agent instruction after an operation.