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Non-contact tonometry (or air-puff tonometry) is different from pneumatonometry and was invented by Bernard Grolman of Reichert, Inc (formerly American Optical). It uses a rapid air pulse to applanate (flatten) the cornea. Corneal applanation is detected via an electro-optical system.
The Schiotz tonometer consists of a curved footplate which is placed on the cornea of a supine patient. A weighted plunger attached to the footplate sinks into the cornea. A scale then gives a reading depending on how much the plunger sinks into the cornea, and a conversion table converts the scale reading into IOP measured in mmHg.
A patient in front of a tonometer. Intraocular pressure (IOP) is the fluid pressure inside the eye. Tonometry is the method eye care professionals use to determine this. IOP is an important aspect in the evaluation of patients at risk of glaucoma. [1]
Reichert's membrane is an extraembryonic membrane that forms during early mammalian embryonic development. [1] It forms as a thickened basement membrane to cover the embryo immediately following implantation to give protection to the embryo from the uterine pressures exerted. Reichert's membrane is also important for the maternofetal exchange ...
Julia Bell Reichert (June 16, 1946 – December 1, 2022) was an American Academy Award-winning documentary filmmaker, activist, and feminist. She was a co-founder of New Day Films . Reichert's filmmaking career spanned over 50 years as a director and producer of documentaries.
Reichert was born in Rastenburg (Kętrzyn), East Prussia. From 1831 he studied at the University of Konigsberg , where he was a student of embryologist Karl Ernst Baer , then continued his education in Berlin under Friedrich Schlemm and Johannes Peter Müller .
The Reichert value is an indicator of how much volatile fatty acid can be extracted from a particular fat or oil through saponification. It is equal to the number of millilitres of 0.1 normal hydroxide solution necessary for the neutralization of the water-soluble volatile fatty acids distilled and filtered from 5 grams of a given saponified fat.