Sagitta of ophthalmic lenses
Purpose To propose alternative formulas for the sagitta calculation of ophthalmic lenses. Methods Equation factoring. Results The conventional sagitta formula is algebraically inconsistent when applied to curves with direction‐oriented radii. It is possible to correct this problem by factoring it. C...
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| Veröffentlicht in: | Ophthalmic & physiological optics 2020-11, Vol.40 (6), p.828-829 |
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| container_title | Ophthalmic & physiological optics |
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| creator | Faria‐e‐Sousa, Sidney Julio |
| description | Purpose
To propose alternative formulas for the sagitta calculation of ophthalmic lenses.
Methods
Equation factoring.
Results
The conventional sagitta formula is algebraically inconsistent when applied to curves with direction‐oriented radii. It is possible to correct this problem by factoring it.
Conclusions
The conventional sagitta formula can and should be replaced by unambiguous equations. |
| doi_str_mv | 10.1111/opo.12732 |
| format | Article |
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To propose alternative formulas for the sagitta calculation of ophthalmic lenses.
Methods
Equation factoring.
Results
The conventional sagitta formula is algebraically inconsistent when applied to curves with direction‐oriented radii. It is possible to correct this problem by factoring it.
Conclusions
The conventional sagitta formula can and should be replaced by unambiguous equations.</description><identifier>ISSN: 0275-5408</identifier><identifier>EISSN: 1475-1313</identifier><identifier>DOI: 10.1111/opo.12732</identifier><language>eng</language><publisher>London: Wiley Subscription Services, Inc</publisher><subject>lens thickness ; ophthalmic lenses ; sag ; sagitta</subject><ispartof>Ophthalmic & physiological optics, 2020-11, Vol.40 (6), p.828-829</ispartof><rights>2020 The Author Ophthalmic & Physiological Optics © 2020 The College of Optometrists</rights><rights>Copyright © 2020 The College of Optometrists</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3302-ff599609302abe3d05163e1d0d26b8f647de73ac2c2f9d05754ca71b8ce6fa273</citedby><cites>FETCH-LOGICAL-c3302-ff599609302abe3d05163e1d0d26b8f647de73ac2c2f9d05754ca71b8ce6fa273</cites><orcidid>0000-0003-3021-8476</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fopo.12732$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fopo.12732$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,777,781,1412,27905,27906,45555,45556</link.rule.ids></links><search><creatorcontrib>Faria‐e‐Sousa, Sidney Julio</creatorcontrib><title>Sagitta of ophthalmic lenses</title><title>Ophthalmic & physiological optics</title><description>Purpose
To propose alternative formulas for the sagitta calculation of ophthalmic lenses.
Methods
Equation factoring.
Results
The conventional sagitta formula is algebraically inconsistent when applied to curves with direction‐oriented radii. It is possible to correct this problem by factoring it.
Conclusions
The conventional sagitta formula can and should be replaced by unambiguous equations.</description><subject>lens thickness</subject><subject>ophthalmic lenses</subject><subject>sag</subject><subject>sagitta</subject><issn>0275-5408</issn><issn>1475-1313</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp10E1LxDAQBuAgCtbVg3cPBS966G6-0x5lWT9goYJ6DmmauF3SpjYtsv_eaD0J5jID80wYXgAuEVyi-Fa-90uEBcFHIEFUsAwRRI5BAnHsGYX5KTgLYQ8hFELkCbh6Ue_NOKrU29T3u3GnXNvo1JkumHAOTqxywVz81gV4u9-8rh-zbfnwtL7bZpoQiDNrWVFwWMReVYbUkCFODKphjXmVW05FbQRRGmtsizgVjGolUJVrw62Kxy7AzfxvP_iPyYRRtk3QxjnVGT8FiSmlRPAC55Fe_6F7Pw1dvC4qRimkhOCobmelBx_CYKzsh6ZVw0EiKL9zkjEn-ZNTtKvZfjbOHP6Hsnwu540vketm5Q</recordid><startdate>202011</startdate><enddate>202011</enddate><creator>Faria‐e‐Sousa, Sidney Julio</creator><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7T5</scope><scope>7TK</scope><scope>H94</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-3021-8476</orcidid></search><sort><creationdate>202011</creationdate><title>Sagitta of ophthalmic lenses</title><author>Faria‐e‐Sousa, Sidney Julio</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3302-ff599609302abe3d05163e1d0d26b8f647de73ac2c2f9d05754ca71b8ce6fa273</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>lens thickness</topic><topic>ophthalmic lenses</topic><topic>sag</topic><topic>sagitta</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Faria‐e‐Sousa, Sidney Julio</creatorcontrib><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Immunology Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Ophthalmic & physiological optics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Faria‐e‐Sousa, Sidney Julio</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sagitta of ophthalmic lenses</atitle><jtitle>Ophthalmic & physiological optics</jtitle><date>2020-11</date><risdate>2020</risdate><volume>40</volume><issue>6</issue><spage>828</spage><epage>829</epage><pages>828-829</pages><issn>0275-5408</issn><eissn>1475-1313</eissn><abstract>Purpose
To propose alternative formulas for the sagitta calculation of ophthalmic lenses.
Methods
Equation factoring.
Results
The conventional sagitta formula is algebraically inconsistent when applied to curves with direction‐oriented radii. It is possible to correct this problem by factoring it.
Conclusions
The conventional sagitta formula can and should be replaced by unambiguous equations.</abstract><cop>London</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1111/opo.12732</doi><tpages>2</tpages><orcidid>https://orcid.org/0000-0003-3021-8476</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0275-5408 |
| ispartof | Ophthalmic & physiological optics, 2020-11, Vol.40 (6), p.828-829 |
| issn | 0275-5408 1475-1313 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_2444376928 |
| source | Wiley Online Library Journals Frontfile Complete |
| subjects | lens thickness ophthalmic lenses sag sagitta |
| title | Sagitta of ophthalmic lenses |
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