contact lens deposits

deposits, contact lens

Accumulation of materials on or into the matrix of contact lenses. They are mainly tear components (proteins, lipids, mucin, calcium) but other materials can be found (e.g. mercurial or iron deposits, nicotine, hand cream). Deposits reduce comfort, vision, patient tolerance and discolour and spoil the lenses. They may act as antigens for the development of giant papillary conjunctivitis. Most of these deposits can be removed with a surfactant, an enzymatic system and a calcium-preventing solution.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
In this study, Blink-N-Clean eye drops produced a significant reduction in contact lens deposits, in terms of heaviness, from five minutes after instillation and this difference was maintained after two weeks of twice daily use.

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