PropertyValue
?:definition
  • Ophthalmic refractors designed to measure the refractive error by changing a set of different lenses mounted in the devices and other settings (also known as manual phoropters or phorometers); these instruments require the examinee\'s responses. These instruments usually consist of a refraction unit including a set of calibrated (i.e., containing a number of plus and minus sphere and clylinder graduations) lenses, a cross-cylinder, a pulillary distance setting, prisms, lens controls, and an external eye chart. Manual ophthalmic refractors measure sphere power and cylinder power and axis, accommodation, convergence, and binocular balancing of the eyes; they are used mainly to establish eyeglass prescription.
?:hasCUIAnnotation
?:hasGeneratedBy
?:type

Metadata

Anon_0  
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/net/provenance/ns#DataItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/03/trix/rdfg-1/Graph>
<http://xmlns.com/foaf/0.1/primaryTopic> <https://research.tib.eu/covid-19/entity/C2721090_UMD>
<http://xmlns.com/foaf/0.1/topic> Anon_0
<http://www.ontologydesignpatterns.org/cp/owl/informationrealization.owl#realizes> <https://research.tib.eu/covid-19/data/entity/C2721090_UMD>
<http://purl.org/net/provenance/ns#createdBy>
Anon_1   (more)
expand all