Retinal laser lenses: magnification, spot size, and field of view
Proper use of ophthalmoscopic contact lenses for retinal photocoagulation requires knowledge of their comparative magnification, spot size, and field of view. We determined these parameters for four commonly used lenses, using data measured from optical components of the lenses and a commonly used p...
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| Veröffentlicht in: | British journal of ophthalmology 1990-03, Vol.74 (3), p.177-179 |
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| creator | Mainster, M A Crossman, J L Erickson, P J Heacock, G L |
| description | Proper use of ophthalmoscopic contact lenses for retinal photocoagulation requires knowledge of their comparative magnification, spot size, and field of view. We determined these parameters for four commonly used lenses, using data measured from optical components of the lenses and a commonly used photo-coagulator slit-lamp and spot size changer. A Krieger lens has 8% more working field of view and 29% less magnification than a Goldmann lens. A Panfundoscope lens has 84% more working field of view and 24% less magnification than a Goldmann lens. A Mainster lens has 58% more working field of view and 3% more magnification than a Goldmann lens. For Goldmann, Krieger, Panfundoscope, and Mainster lenses, respectively, retinal spot size is 8%, 53%, 41%, and 5% greater than photo-coagulator spot size settings. The field of view of each lens is increased in myopic and decreased in hyperopic patients. Anterior segment irradiance is higher than retinal irradiance for 1000 microns spot size settings with a Panfundoscope or Mainster lens, and this setting should be avoided, especially in patients with hazy ocular media. |
| doi_str_mv | 10.1136/bjo.74.3.177 |
| format | Article |
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We determined these parameters for four commonly used lenses, using data measured from optical components of the lenses and a commonly used photo-coagulator slit-lamp and spot size changer. A Krieger lens has 8% more working field of view and 29% less magnification than a Goldmann lens. A Panfundoscope lens has 84% more working field of view and 24% less magnification than a Goldmann lens. A Mainster lens has 58% more working field of view and 3% more magnification than a Goldmann lens. For Goldmann, Krieger, Panfundoscope, and Mainster lenses, respectively, retinal spot size is 8%, 53%, 41%, and 5% greater than photo-coagulator spot size settings. The field of view of each lens is increased in myopic and decreased in hyperopic patients. Anterior segment irradiance is higher than retinal irradiance for 1000 microns spot size settings with a Panfundoscope or Mainster lens, and this setting should be avoided, especially in patients with hazy ocular media.</description><identifier>ISSN: 0007-1161</identifier><identifier>EISSN: 1468-2079</identifier><identifier>DOI: 10.1136/bjo.74.3.177</identifier><identifier>PMID: 2322517</identifier><identifier>CODEN: BJOPAL</identifier><language>eng</language><publisher>BMA House, Tavistock Square, London, WC1H 9JR: BMJ Publishing Group Ltd</publisher><subject>Biological and medical sciences ; Contact Lenses ; Eye ; Humans ; Light Coagulation - instrumentation ; Medical sciences ; Models, Anatomic ; Ophthalmoscopy ; Optics and Photonics ; Retina - surgery ; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases ; Surgery of the eye and orbit</subject><ispartof>British journal of ophthalmology, 1990-03, Vol.74 (3), p.177-179</ispartof><rights>1990 INIST-CNRS</rights><rights>Copyright BMJ Publishing Group LTD Mar 1990</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-b535t-eac29b25d0a29e78310cb11460c9a0a65e2a63e270f1ed4b76349aec690b0f093</citedby><cites>FETCH-LOGICAL-b535t-eac29b25d0a29e78310cb11460c9a0a65e2a63e270f1ed4b76349aec690b0f093</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC1042043/pdf/$$EPDF$$P50$$Gpubmedcentral$$H</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC1042043/$$EHTML$$P50$$Gpubmedcentral$$H</linktohtml><link.rule.ids>230,314,723,776,780,881,27903,27904,53769,53771</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=6907102$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/2322517$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Mainster, M A</creatorcontrib><creatorcontrib>Crossman, J L</creatorcontrib><creatorcontrib>Erickson, P J</creatorcontrib><creatorcontrib>Heacock, G L</creatorcontrib><title>Retinal laser lenses: magnification, spot size, and field of view</title><title>British journal of ophthalmology</title><addtitle>Br J Ophthalmol</addtitle><description>Proper use of ophthalmoscopic contact lenses for retinal photocoagulation requires knowledge of their comparative magnification, spot size, and field of view. We determined these parameters for four commonly used lenses, using data measured from optical components of the lenses and a commonly used photo-coagulator slit-lamp and spot size changer. A Krieger lens has 8% more working field of view and 29% less magnification than a Goldmann lens. A Panfundoscope lens has 84% more working field of view and 24% less magnification than a Goldmann lens. A Mainster lens has 58% more working field of view and 3% more magnification than a Goldmann lens. For Goldmann, Krieger, Panfundoscope, and Mainster lenses, respectively, retinal spot size is 8%, 53%, 41%, and 5% greater than photo-coagulator spot size settings. The field of view of each lens is increased in myopic and decreased in hyperopic patients. Anterior segment irradiance is higher than retinal irradiance for 1000 microns spot size settings with a Panfundoscope or Mainster lens, and this setting should be avoided, especially in patients with hazy ocular media.</description><subject>Biological and medical sciences</subject><subject>Contact Lenses</subject><subject>Eye</subject><subject>Humans</subject><subject>Light Coagulation - instrumentation</subject><subject>Medical sciences</subject><subject>Models, Anatomic</subject><subject>Ophthalmoscopy</subject><subject>Optics and Photonics</subject><subject>Retina - surgery</subject><subject>Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases</subject><subject>Surgery of the eye and orbit</subject><issn>0007-1161</issn><issn>1468-2079</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><recordid>eNp9kc2LFDEUxIMo6-zqzavQoKyX6fEl6U42HoRl_FhhUdDVg5fwOv16zdjdGZOe9eOvN8MMg3rwFEL9XlFUMfaAw4JzqZ42q7DQ1UIuuNa32IxX6qwUoM1tNgMAXXKu-F12nNIqf4Xi-ogdCSlEzfWMnb-nyY_YFz0mikVPY6L0rBjwevSddzj5MM6LtA5Tkfwvmhc4tkXnqW-L0BU3nr7fY3c67BPd378n7OOrl1fLi_Ly3es3y_PLsqllPZWETphG1C2gMKTPJAfX8BwWnEFAVZNAJUlo6Di1VaOVrAySUwYa6MDIE_Z857veNAO1jsYpYm_X0Q8Yf9qA3v6tjP6LvQ43lkMloJLZ4HRvEMO3DaXJDj456nscKWyS1UZzmYNl8NE_4CpsYi4p2VwxgFRab_PMd5SLIaVI3SEKB7sdxuZhrK6s3F5l_OGf8Q_wfomsP97rmBz2XcTR-XTAcg2ag8hYucN8mujHQcb41SotdW3fflra5Yerzy9MbexF5p_s-GZY_T_gb5olsLo</recordid><startdate>19900301</startdate><enddate>19900301</enddate><creator>Mainster, M A</creator><creator>Crossman, J L</creator><creator>Erickson, P J</creator><creator>Heacock, G L</creator><general>BMJ Publishing Group Ltd</general><general>BMJ</general><general>BMJ Publishing Group LTD</general><scope>BSCLL</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BTHHO</scope><scope>CCPQU</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>K9.</scope><scope>M0S</scope><scope>M1P</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>19900301</creationdate><title>Retinal laser lenses: magnification, spot size, and field of view</title><author>Mainster, M A ; Crossman, J L ; Erickson, P J ; Heacock, G L</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-b535t-eac29b25d0a29e78310cb11460c9a0a65e2a63e270f1ed4b76349aec690b0f093</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1990</creationdate><topic>Biological and medical sciences</topic><topic>Contact Lenses</topic><topic>Eye</topic><topic>Humans</topic><topic>Light Coagulation - instrumentation</topic><topic>Medical sciences</topic><topic>Models, Anatomic</topic><topic>Ophthalmoscopy</topic><topic>Optics and Photonics</topic><topic>Retina - surgery</topic><topic>Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases</topic><topic>Surgery of the eye and orbit</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mainster, M A</creatorcontrib><creatorcontrib>Crossman, J L</creatorcontrib><creatorcontrib>Erickson, P J</creatorcontrib><creatorcontrib>Heacock, G L</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>BMJ Journals</collection><collection>ProQuest One Community College</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>British journal of ophthalmology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mainster, M A</au><au>Crossman, J L</au><au>Erickson, P J</au><au>Heacock, G L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Retinal laser lenses: magnification, spot size, and field of view</atitle><jtitle>British journal of ophthalmology</jtitle><addtitle>Br J Ophthalmol</addtitle><date>1990-03-01</date><risdate>1990</risdate><volume>74</volume><issue>3</issue><spage>177</spage><epage>179</epage><pages>177-179</pages><issn>0007-1161</issn><eissn>1468-2079</eissn><coden>BJOPAL</coden><abstract>Proper use of ophthalmoscopic contact lenses for retinal photocoagulation requires knowledge of their comparative magnification, spot size, and field of view. We determined these parameters for four commonly used lenses, using data measured from optical components of the lenses and a commonly used photo-coagulator slit-lamp and spot size changer. A Krieger lens has 8% more working field of view and 29% less magnification than a Goldmann lens. A Panfundoscope lens has 84% more working field of view and 24% less magnification than a Goldmann lens. A Mainster lens has 58% more working field of view and 3% more magnification than a Goldmann lens. For Goldmann, Krieger, Panfundoscope, and Mainster lenses, respectively, retinal spot size is 8%, 53%, 41%, and 5% greater than photo-coagulator spot size settings. The field of view of each lens is increased in myopic and decreased in hyperopic patients. 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| ispartof | British journal of ophthalmology, 1990-03, Vol.74 (3), p.177-179 |
| issn | 0007-1161 1468-2079 |
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| source | MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; Alma/SFX Local Collection |
| subjects | Biological and medical sciences Contact Lenses Eye Humans Light Coagulation - instrumentation Medical sciences Models, Anatomic Ophthalmoscopy Optics and Photonics Retina - surgery Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases Surgery of the eye and orbit |
| title | Retinal laser lenses: magnification, spot size, and field of view |
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