The epidemiology of contact lens related infiltrates.

Vision Cooperative Research Centre, University of New South Wales, Sydney, Australia.
Optometry and Vision Science (Impact Factor: 2.04). 05/2007; 84(4):257-72. DOI: 10.1097/OPX.0b013e3180485d5f
Source: PubMed

ABSTRACT With estimated numbers of contact lens wearers worldwide exceeding 140 million, even complications with a low incidence will affect a significant number of individuals. Although contact lenses clearly have many advantages for wearers, certain risks have been associated with their use. Differences in risk for different types of contact lenses and wearing patterns have been demonstrated for both rare and common lens related complications. This review particularly focuses on the incidence and etiology of contact lens related corneal infection and inflammation. An understanding of the risks and contributory factors to these conditions is important for practitioners and will enable an informed choice of safer lens wear modalities, wear schedules, and hygiene regimes to be made.

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    ABSTRACT: La ortoqueratología nocturna es una alternativa contactológica para la corrección refractiva, siendo el resultado de los avances de los últimos 50 años. El tratamiento se aplica durante la fase del sueño, dando lugar a la reducción o eliminación temporal del error refractivo miópico mediante la adaptación de lentes de contacto de doble geometría inversa. Como cualquier otra técnica contactológica, está asociada a una serie de riesgos y/o complicaciones. Por lo tanto, para la adaptación de este tipo de lentes de contacto, es necesaria la utilización de un consentimiento informado, ya que la ortoqueratología nocturna es un proceso asociado a potenciales riesgos médicos. En el presente artículo proponemos un modelo de consentimiento informado, acorde a la legislación vigente, para este tipo de adaptación contactológica.
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    ABSTRACT: Tear exchange beneath a contact lens facilitates ongoing fluid replenishment between the ocular surface and the lens. This exchange is considerably lower during the wear of soft lenses compared with rigid lenses. As a result, the accumulation of tear film debris and metabolic by-products between the cornea and a soft contact lens increases, potentially leading to complications. Lens design innovations have been proposed, but no substantial improvement in soft lens tear exchange has been reported. Researchers have determined post-lens tear exchange using several methods, notably fluorophotometry. However, due to technological limitations, little remains known about tear hydrodynamics around the lens and, to-date, true tear exchange with contact lenses has not been shown. Further knowledge regarding tear exchange could be vital in aiding better contact lens design, with the prospect of alleviating certain adverse ocular responses.
    Journal of Optometry 01/2015; 8(1). DOI:10.1016/j.optom.2014.12.001

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