the geometric concept signifying that at a certain point, two curves (or a curve and a surface) have a common tangent line or two surfaces have a common tangent plane. The order of contact is a characteristic of the proximity of two curves (a curve and a surface, or two surfaces) in ...
After finding contact lenses that fit properly, are comfortable for you, and provide good vision, youreye doctorcan write your contact lens prescription. This prescription will designate contact lens power, a shape matching the curvature of your eye (base curve), and diameter. Usually, it takes ...
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In the calculations for the thickness of the lubricant film, or establishing the lubrication regimes using the Stribeck curve, it is necessary to account for the changes of the viscosity as the temperature and the pressure change. Several relations have been published in the technical literature, ...
Its refractive index is 1.395, water content 60%, oxygen permeability coefficient 25 × 10− 11 (cm2/s) (ml O2)/(ml·mmHg), total diameter 14.2 mm, base curve 8.7 mm. The control group wore Kodak aspheric single vision lenses with a refractive index of 1.56. According to the...
The curvature of the optical zone of the lenses (called the base curve, or BC) The diameter of the lenses An expiration date for purchasing replacement lenses Your optician might also specify wearing instructions on your contact lens prescription, such as, “Not to be worn overnight; replace ...
In February 2023, to overcome breaks in transmission and loss of quality, Sennheiser launched IE 200 wired earphones that feature a natural frequency response curve and virtually nonexistent harmonic distortion usually found in earphones. The brand has also improved the braided cable, which reduces ha...
To ensure you’re ahead of the curve, send early and let customers marinate over the deals you’re about to drop. As the new year approaches, send a follow-up email or use text message marketing to remind your customers to dig up their discount codes and haul out their credit cards to...
Below wave base lacustrine deposits (g) Accumulations of horizontally bedded, well sorted, fine-grained sediment. Often with the presence of massive or rhythmic lamination. Occasional presence of ice-rafted debris (dropstones (g)), rhythmites, climbing ripples and deformation structures within. Found...
FIG. 9 is a chart of flexure-load characteristics (upon application of no vibration) of the conductive contacts in the conductive contact unit according to the first embodiment of the present invention. FIG. 10 is a diagram of an internal structure of a conductive contact unit according to the...