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to correct refractive errors of the eye; not invasive Contact lenses: to correct refractive errors of the eye; a little invasive Phoropter: used in refraction testing Tonometers: used to determine the intraoccular pressure (IOP) - useful in glaucoma; video link for various types of tonometers. Speculum: to keep the eyes open during any operation
Punched pockets are made in several sizes, with the most prevalent being A4 (210 mm × 297 mm; 8.3 in × 11.7 in) for Europe, or 8.5 by 11 inches (216 by 279 mm) for the United States. Depending on the location of the opening, punched pockets may be top-loading or side-loading which dictates how the document is inserted into the pocket.
Goggles, or safety glasses, are forms of protective eyewear that usually enclose or protect the area surrounding the eye in order to prevent particulates, water or chemicals from striking the eyes. They are used in chemistry laboratories and in woodworking. They are often used in snow sports as well, and in the sport of swimming.
Higher-quality optical-grade glass materials exist (e.g. Borosilicate crown glasses such as BK7 ( n d = 1.51680 , V d = 64.17 , D = 2.51 g/cm³ ), which is commonly used in telescopes and binoculars, and fluorite crown glasses such as the best optical quality low dispersion glass currently in production, N-FK58 made by the German company Schott ...
The automatic center punch mechanism has been used for a wide variety of other applications. These include Marking and starting a hole for drilling without the bit "walking" out of alignment; Letter stamp sets; Glass-breaking tools used in rescue work and a common tool for a car thief. Impact tool for hardness testing [21]
An eyeglass prescription. Similar to medical prescriptions, eyeglass prescriptions are written on paper pads or included in a patient's electronic health record, and contain a number of different abbreviations and terms: DV is an abbreviation for distance vision. This specifies the part of the prescription designed primarily to improve far vision.
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A doctor may recommend eye drops for those with ptosis. [3] Sensitivity to metals are a concern as well; it is helpful if eye crutches are made with non-allergenic metals, such as titanium/nickel alloys. [5] Ptosis crutches should be kept clean. Mild soaps, specific eyeglass cleaning solutions, and proper coatings may help with maintenance. The ...
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