Consumer electronics

Consumer electronics

A broad field of electronics that are purchased for casual use or entertainment rather than for professional use; such as TVs, VCRS, DVD players,mp3 players, hi fi stereos, games consoles as well as Internet appliances.

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Astigmatic effect

Eyewear; Optometry

Collective description of the cylindrical power and the cylinder axis.

Distance optical centre

Eyewear; Optometry

Optical centre of the distance portion.

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

Inset

Eyewear; Optometry

Displacement of a multifocal segment from the distance reference point towards the nose, usually whithout reference to the effect on the near optical centres.