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Human rights
Fundamental and universal rights and freedoms to which all human beings are entitled. They consist of civil, political, economic, social and cultural rights that States are obliged to fully respect according to common standards ratified by national and international legislation.
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Astigmatic effect
Eyewear; Optometry
Collective description of the cylindrical power and the cylinder axis.
Reference seeing distance
Eyewear; Optometry
Agreed distance of 250 mm between the object side (first) nodal point of the eye and the object observed. The reference seeing distance is used, above all, as a reference ...
Intraocular pressure
Eyewear; Optometry
Eye pressure, as determined by the amount of aqueous humour filling it. High IOP (ocular hypertension) can be a sign of glaucoma
Interpupillary distance
Eyewear; Optometry
Distance between the centres of the pupils when the eyes are fixating an object at an infinite distance in the straight-ahead position.
Fitting point position
Eyewear; Optometry
Vertical and horizontal fitting distances and directions of the fitting point from the boxed centre of the lens shape.