Final answer:
Substances used as vitreous substitutes or tamponades are typically related to ophthalmic surgeries and do not directly lower blood pressure or reduce edema. For lowering blood pressure and edema, diuretics are used as they help to remove excess fluid from the body. In eye surgeries, substances like silicon oil or gas tamponades provide mechanical support.
Step-by-step explanation:
In the context of medicine, substances used as a vitreous substitute or tamponade to lower blood pressure or reduce swelling from fluid buildup are typically related to treatments for conditions like edema or after ophthalmic surgeries. While the question seems to blend two somewhat different contexts - ophthalmology and general medicine, a common denominator could be the use of saline solutions or certain gels in ophthalmology that serve a mechanical purpose similar to how diuretics operate to manage fluid in medical situations.
However, for specificity, in the case of vitreous substitute or tamponade in an ocular context, silicon oil, perfluorocarbons, or gas tamponades might be used, and these do not apply to blood pressure treatment or edema.
For lowering blood pressure and reducing edema, diuretics are often the type of medication prescribed. Diuretics help the kidneys remove excess salt and water from the body, which can reduce the volume of blood, leading to lower blood pressure. In contrast, in eye surgeries, the goal of a tamponade is to provide support and maintain the shape of the eye, rather than to manage fluid levels systemically.