The Regional Centers for Security Studies support the National Defense Strategy and DoD. security cooperation priorities with programs designed to enhance security, deepen. understanding of the United States, foster bilateral and multilateral partnerships, improve.
Of the 650 species of leech listed, Hirudo medicinalis is one of the most extensively studied. This annelid from the subclass Hirudinea has 2 suckers, one housing the mouth and its 3 jaws. It lives mainly in the stagnant waters of marshes and ponds. When it comes to reproduction, the animal is a hermaphrodite. Inseminated leeches lay their eggs during the spring and summer months, outside the water, with cocoons containing as many as thirty young.
Secondary piggyback IOLs are available as monofocal, multifocal, toric and multifocal toric models. 10 There are three IOLs specifically designed for secondary implantation in the ciliary sulcus to correct pseudophakic ametropias or pseudophakic presbyopia: the Sulcoflex (Rayner Intraocular Lenses Ldt, East Sussex, United Kingdom), which was the first to be commercially available, the Add-On (HumanOptics, Erlangen, Germany) and the 1st Add-On (1st Q GmbH, Mannheim, Germany).