Medical & Surgical Ophthalmology

Deep non-perforating scleretomy (npps)

What is the deep non-perforating scleretomy (npps)?

Non-perforating deep sclerectomy consists of a surgical procedure whose purpose is to obtain a drainage path for the aqueous humor through the trabeculo-descemetic membrane (a membrane a few microns in size) that will generate resistance to outflow, but will allow a decrease in the flow rate. Intraocular pressure, in some types of glaucoma.

In which cases is it done?

Non-perforating deep sclerectomy should be performed in eyes that have an open iridocorneal angle; therefore, it is totally contraindicated in angle-closure glaucoma, synechiae, or iridocorneal syndromes.

Previous exams

A complete ophthalmological examination will be carried out prior to surgery. It is important to perform a gonioscopy to measure the angle and know if it is open or closed.

During the intervention

The surgeon will create this drainage pathway to achieve a decrease in intraocular pressure in a manner similar to the physiological one. It is a safe surgery and can be performed alone or in combination with cataract surgery.

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