[Microsurgical release of subretinal fluid in retinal detachment. Report on 200 cases (author's transl)].

When the incision of the sclera, suprachoroidea and choroidea is performed under the microscope step by step, the release of subretinal fluid becomes an absolutely controlled microsurgical procedure. When employing this technique, one can avoid complications related to the injury of choroidal vessels, especially if one uses transillumination with fibre-optics during the perforation of the choroid. A further useful tool for drainage is a sclerotomy retractor which allows the spreading out the edges of the sclerotomy--wound by grasping the loops and pulling them aside of a pre-placed Mendoza suture. As the retractor does not engage the sclera directly but only with the aid of the pre-placed suture, it is possible to observe the operation field without any hindrance from the instrument and to perform microsurgical incision of the chroid at any desired point.