Abstract: This invention relates to the use of a high frequency bipolar diathermy tip to perform incisions, volatilization and coagulation of tissues necessary in the surgeries of presbyopia, glaucoma and cataract. This tip acts on the sclera, cornea, iris, trabecular meshwork and peri-scleral tissues, such as Tenon's capsule, performing incisions, volatilization(excision) and/or coagulation on a very controlled way, replacing what was thought to be possible only with very expensive lasers. The method allows for very little damage on surrounding tissues. The diathermy tip delivers plasma, in a pulsed way, for a safe and effective treatment.