scleral indentation

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indentation, scleral

A clinical procedure used in conjunction with indirect ophthalmoscopy in which some slight pressure is applied to the sclera to bring the peripheral retina into view. Retinal detachments and tears, for example, are more easily seen with this procedure. Pressure is usually applied with an instrument called an indentor. The technique is contraindicated in patients with elevated intraocular pressure. See indirect ophthalmoscope.
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They further said mostly indentors deals in basic raw material of Industries and they are source of quality goods supplying to manufacturing and Export sector to ensure smooth production of industries .
The subject panel is used for recording the subject's pressure perceptions related to discomfort and pain [29,31] and as a safety device: when the pain switch is pressed, the indentor is released automatically.
The new approach is to progressively load the indentor with comparatively small loads and to measure the indentor penetration depth with the indentor in place.
The blank is subjected to pressure flaking with a hardwood indentor.
The Rockwell test can be performed with various indentor sizes and loads.
Using a dynamic mechanical analyzer (DMA) running in static mode, equipped with the same indentor tip used to measure durometer D per ASTM D2240, the most widely used test method to measure rubber hardness; and
Since the radius of the indentor, R, is very much greater than the indentation depth, h, the approximation:
Microhardness measurements on the clearcoat only or basecoat/clearcoat composite structures were made with a Fischer Microhardness H-100 apparatus equipped with a Vickers indentor and a 100-mN load.
Thus, a hardness test on carbide basically establishes the depth of penetration of the indentor into the softer binder material containing the distributed, suspended hard grains.
Using the metallographic analysis of the coating material in the area of penetration of the diamond indentor of unit MPT-3, the presence of a zone of plasticity and zone of fracture, consisting of lateral and radial cracks was observed.
Conventional test methods used to quantify the scratch resistance were measurements such as: reduction in gloss of a coating after being subjected to a traversing tangential load of known particle size abrasive (crockmeter test); measurement of damage depth and recovery of damage depth of a coating after exposure to a single point indentor (nanoindentor (22,23)); or quantitative measurement of the fraction of elastic, viscoelastic creep, and fracture response of a coating after exposure to a single point indentor (scanning probe microscope (24)).
The scratches on the PC and the ABS samples were made using a 400 [micro]m radius, 90[degrees] cone-angle indentor and 400 g normal load.