Linked Life Data

2156725

Source:http://linkedlifedata.com/resource/pubmed/id/2156725

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1990-5-4
pubmed:abstractText
The reaction of the precorneal tear film of the human eye was determined non-invasively by instilling pyranine, a pH-sensitive fluorescent dye. The mean value was 7.83 (S.D. +/- 0.10) and it takes up this value immediately on opening the eye after the lids had been kept closed. The HCO3 system seems to be responsible for only a portion of the buffering power of the tear film. When a drop buffered to pH 6.4 with 0.075 M PO4 was instilled, the tears returned to their normal value in about 7 min, consistent with the washout times of solutes in the conjunctival sac. A pH of 7.3 was established in the tear fluid behind contact lenses either gas permeable or impermeable, probably as a result of their restricting the loss of CO2 from the eye.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0014-4835
pubmed:author
pubmed:issnType
Print
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
251-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
The pH in the precorneal tear film and under a contact lens measured with a fluorescent probe.
pubmed:affiliation
Department of Ophthalmology, Stanford University Medical Center, CA 94305.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.