Matches in SemOpenAlex for { <https://semopenalex.org/work/W14700830> ?p ?o ?g. }
Showing items 1 to 75 of
75
with 100 items per page.
- W14700830 abstract "This thesis investigates the use of low temperature plasmas as a means of improving the surface properties of hard gas permeable contact lenses. It is important that the polymers used for this application should have good optical properties, should allow transport of oxygen to the cornea and be biocompatible, that is they should not stimulate an adverse response in the tissues which they contact. Whilst most patients have no problems with current materials there are a significant number who experience irritation of the eyes and abnormal build up of deposits on the lens surface. It has been found that mild oxygen plasma treatment of the contact lens can be helpful in alleviating these problems. In this volume the effects of such treatment are examined by x-ray photoelectron spectroscopy and alternative treatments proposed. It is found that the oxygen plasma treatment increases the wettability of the lens surface by the incorporation of oxygen in the polymer. This effect decays with time but is not wholly lost on prolonged storage. The mechanism of this decay appears to be a migration of oxidized material from the surface and is dependent on the storage conditions. During this decay an anomalous transient increase in hydrophilicity was encountered which can be associated with the temporary return of highly oxidized material to the surface. This effect is observed in other polymers and can be shown to be temperature dependent. The use of plasma polymerization as an alternative treatment was investigated and a number of materials produced with similar surface properties to the oxygen treated lens material. It was hoped that a coating would be generally applicable to a variety of lens materials.*Adsorption studies showed that the oxygen treated material has the property of reversibly adsorbing glycoproteins which may account for its performance in the eye. Some of the plasma polymer coatings gave a similar response." @default.
- W14700830 created "2016-06-24" @default.
- W14700830 creator A5073892736 @default.
- W14700830 date "1990-01-01" @default.
- W14700830 modified "2023-09-23" @default.
- W14700830 title "The plasma treatment of contact lenses" @default.
- W14700830 hasPublicationYear "1990" @default.
- W14700830 type Work @default.
- W14700830 sameAs 14700830 @default.
- W14700830 citedByCount "0" @default.
- W14700830 crossrefType "dissertation" @default.
- W14700830 hasAuthorship W14700830A5073892736 @default.
- W14700830 hasConcept C120665830 @default.
- W14700830 hasConcept C121332964 @default.
- W14700830 hasConcept C127413603 @default.
- W14700830 hasConcept C134514944 @default.
- W14700830 hasConcept C15336307 @default.
- W14700830 hasConcept C159985019 @default.
- W14700830 hasConcept C171250308 @default.
- W14700830 hasConcept C175708663 @default.
- W14700830 hasConcept C178790620 @default.
- W14700830 hasConcept C185592680 @default.
- W14700830 hasConcept C192562407 @default.
- W14700830 hasConcept C2986805488 @default.
- W14700830 hasConcept C42360764 @default.
- W14700830 hasConcept C521977710 @default.
- W14700830 hasConcept C540031477 @default.
- W14700830 hasConcept C62520636 @default.
- W14700830 hasConcept C6556556 @default.
- W14700830 hasConcept C82706917 @default.
- W14700830 hasConceptScore W14700830C120665830 @default.
- W14700830 hasConceptScore W14700830C121332964 @default.
- W14700830 hasConceptScore W14700830C127413603 @default.
- W14700830 hasConceptScore W14700830C134514944 @default.
- W14700830 hasConceptScore W14700830C15336307 @default.
- W14700830 hasConceptScore W14700830C159985019 @default.
- W14700830 hasConceptScore W14700830C171250308 @default.
- W14700830 hasConceptScore W14700830C175708663 @default.
- W14700830 hasConceptScore W14700830C178790620 @default.
- W14700830 hasConceptScore W14700830C185592680 @default.
- W14700830 hasConceptScore W14700830C192562407 @default.
- W14700830 hasConceptScore W14700830C2986805488 @default.
- W14700830 hasConceptScore W14700830C42360764 @default.
- W14700830 hasConceptScore W14700830C521977710 @default.
- W14700830 hasConceptScore W14700830C540031477 @default.
- W14700830 hasConceptScore W14700830C62520636 @default.
- W14700830 hasConceptScore W14700830C6556556 @default.
- W14700830 hasConceptScore W14700830C82706917 @default.
- W14700830 hasLocation W147008301 @default.
- W14700830 hasOpenAccess W14700830 @default.
- W14700830 hasPrimaryLocation W147008301 @default.
- W14700830 hasRelatedWork W2008030092 @default.
- W14700830 hasRelatedWork W2028006059 @default.
- W14700830 hasRelatedWork W2047513518 @default.
- W14700830 hasRelatedWork W2053701609 @default.
- W14700830 hasRelatedWork W2058068630 @default.
- W14700830 hasRelatedWork W2083103793 @default.
- W14700830 hasRelatedWork W2095555258 @default.
- W14700830 hasRelatedWork W2113201150 @default.
- W14700830 hasRelatedWork W2184511611 @default.
- W14700830 hasRelatedWork W224806801 @default.
- W14700830 hasRelatedWork W2356340388 @default.
- W14700830 hasRelatedWork W2365606126 @default.
- W14700830 hasRelatedWork W2767276302 @default.
- W14700830 hasRelatedWork W2793076989 @default.
- W14700830 hasRelatedWork W2890537834 @default.
- W14700830 hasRelatedWork W2984425883 @default.
- W14700830 hasRelatedWork W3126599520 @default.
- W14700830 hasRelatedWork W617839666 @default.
- W14700830 hasRelatedWork W165409035 @default.
- W14700830 hasRelatedWork W2770254742 @default.
- W14700830 isParatext "false" @default.
- W14700830 isRetracted "false" @default.
- W14700830 magId "14700830" @default.
- W14700830 workType "dissertation" @default.