Clinical comparison of automated and manual keratometry in pre-operative ocular biometry
Corneal measurements, using the manual (Topcon OM-4) and automated (Canon RK-1) keratometers was performed on 104 eyes of 104 patients undergoing cataract and implant surgery to assess the role of automated keratometry in pre-operative ocular biometry. Four eyes of four patients were excluded from s...
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| Veröffentlicht in: | Eye (London) 1992-01, Vol.6 (1), p.60-62 |
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| creator | SunderRaj, Palaniswamy |
| description | Corneal measurements, using the manual (Topcon OM-4) and automated (Canon RK-1) keratometers was performed on 104 eyes of 104 patients undergoing cataract and implant surgery to assess the role of automated keratometry in pre-operative ocular biometry. Four eyes of four patients were excluded from statistical analyses for various reasons. The time taken to perform automated keratometry was a mean of 61 (SD 21) seconds compared to 205 (SD 37) seconds for manual keratometry; the difference was statistically significant (p |
| doi_str_mv | 10.1038/eye.1992.11 |
| format | Article |
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Four eyes of four patients were excluded from statistical analyses for various reasons. The time taken to perform automated keratometry was a mean of 61 (SD 21) seconds compared to 205 (SD 37) seconds for manual keratometry; the difference was statistically significant (p<0.001). In terms of the various keratometry values compared, mean K (corneal refractive power), flattest K, steepest K, astigmatism and the axis of astigmatism, 65% to 75% of the cases on automated keratometry were within 0.26 dioptres or 11° of manually determined values; the difference was statistically significant (p<0.001). 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Four eyes of four patients were excluded from statistical analyses for various reasons. The time taken to perform automated keratometry was a mean of 61 (SD 21) seconds compared to 205 (SD 37) seconds for manual keratometry; the difference was statistically significant (p<0.001). In terms of the various keratometry values compared, mean K (corneal refractive power), flattest K, steepest K, astigmatism and the axis of astigmatism, 65% to 75% of the cases on automated keratometry were within 0.26 dioptres or 11° of manually determined values; the difference was statistically significant (p<0.001). Although automated keratometry was significantly quicker than manual keratometry, we continue to use manual keratometry values for intraocular lens power calculations as the accuracy demonstrated by automated keratometry was considered inadequate for this purpose.</description><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Biological and medical sciences</subject><subject>Cataract Extraction</subject><subject>Cornea - pathology</subject><subject>Female</subject><subject>Humans</subject><subject>Investigative techniques of ocular function and vision</subject><subject>Investigative techniques, diagnostic techniques (general aspects)</subject><subject>Laboratory Medicine</subject><subject>Lenses, Intraocular</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Medicine</subject><subject>Medicine & Public Health</subject><subject>Middle Aged</subject><subject>Ophthalmology</subject><subject>Ophthalmology - methods</subject><subject>Optometry - methods</subject><subject>Pharmaceutical Sciences/Technology</subject><subject>Preoperative Care - methods</subject><subject>Prospective Studies</subject><subject>Surgery</subject><subject>Surgical Oncology</subject><issn>0950-222X</issn><issn>1476-5454</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNptkE1r3DAQQEVJSTZpTzkHdCi9pN5oJMteHcPSLwj00kBuYtYaFyW25Errwv77avHSXnISzHvMiMfYNYg1CLW5owOtwRi5BnjDVlC3TaVrXZ-xlTBaVFLKpwt2mfOzEAW24pydQy2bWsgVe9oOPvgOB97FccLkcww89hznfRxxT45jcHzEMBflhRKWMe3TgfvAp0RVnI4z_4d47OYBE9_5RXjH3vY4ZHp_eq_Y45fPP7ffqocfX79v7x-qTgkJ1aamWuy0bKB1ZFrtpENdkCGnTGNASWewRaUbqEnqFtBtZG-QtBRFNuqKfVz2Tin-ninv7ehzR8OAgeKcbasUgGqgiLeL2KWYc6LeTsmPmA4WhD12tKWjPXa0cLRvTmvn3Ujuv7uEK_zDiWMu9fqEofP5n1Z-Z0y7KdqnRcuFhF-U7HOcUyhBXr36F_93iaM</recordid><startdate>19920101</startdate><enddate>19920101</enddate><creator>SunderRaj, Palaniswamy</creator><general>Nature Publishing Group UK</general><general>Nature Publishing Group</general><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>7X8</scope></search><sort><creationdate>19920101</creationdate><title>Clinical comparison of automated and manual keratometry in pre-operative ocular biometry</title><author>SunderRaj, Palaniswamy</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3021-84e40b52617de975d2da5c309ed3969132d9a7a35614e2571ad82f9ae5205d293</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>Biological and medical sciences</topic><topic>Cataract Extraction</topic><topic>Cornea - pathology</topic><topic>Female</topic><topic>Humans</topic><topic>Investigative techniques of ocular function and vision</topic><topic>Investigative techniques, diagnostic techniques (general aspects)</topic><topic>Laboratory Medicine</topic><topic>Lenses, Intraocular</topic><topic>Male</topic><topic>Medical sciences</topic><topic>Medicine</topic><topic>Medicine & Public Health</topic><topic>Middle Aged</topic><topic>Ophthalmology</topic><topic>Ophthalmology - methods</topic><topic>Optometry - methods</topic><topic>Pharmaceutical Sciences/Technology</topic><topic>Preoperative Care - methods</topic><topic>Prospective Studies</topic><topic>Surgery</topic><topic>Surgical Oncology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>SunderRaj, Palaniswamy</creatorcontrib><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>MEDLINE - Academic</collection><jtitle>Eye (London)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>SunderRaj, Palaniswamy</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Clinical comparison of automated and manual keratometry in pre-operative ocular biometry</atitle><jtitle>Eye (London)</jtitle><stitle>Eye</stitle><addtitle>Eye (Lond)</addtitle><date>1992-01-01</date><risdate>1992</risdate><volume>6</volume><issue>1</issue><spage>60</spage><epage>62</epage><pages>60-62</pages><issn>0950-222X</issn><eissn>1476-5454</eissn><coden>EYEEEC</coden><abstract>Corneal measurements, using the manual (Topcon OM-4) and automated (Canon RK-1) keratometers was performed on 104 eyes of 104 patients undergoing cataract and implant surgery to assess the role of automated keratometry in pre-operative ocular biometry. Four eyes of four patients were excluded from statistical analyses for various reasons. The time taken to perform automated keratometry was a mean of 61 (SD 21) seconds compared to 205 (SD 37) seconds for manual keratometry; the difference was statistically significant (p<0.001). In terms of the various keratometry values compared, mean K (corneal refractive power), flattest K, steepest K, astigmatism and the axis of astigmatism, 65% to 75% of the cases on automated keratometry were within 0.26 dioptres or 11° of manually determined values; the difference was statistically significant (p<0.001). Although automated keratometry was significantly quicker than manual keratometry, we continue to use manual keratometry values for intraocular lens power calculations as the accuracy demonstrated by automated keratometry was considered inadequate for this purpose.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>1426402</pmid><doi>10.1038/eye.1992.11</doi><tpages>3</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Eye (London), 1992-01, Vol.6 (1), p.60-62 |
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| language | eng |
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| source | MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Springer Nature - Complete Springer Journals |
| subjects | Aged Aged, 80 and over Biological and medical sciences Cataract Extraction Cornea - pathology Female Humans Investigative techniques of ocular function and vision Investigative techniques, diagnostic techniques (general aspects) Laboratory Medicine Lenses, Intraocular Male Medical sciences Medicine Medicine & Public Health Middle Aged Ophthalmology Ophthalmology - methods Optometry - methods Pharmaceutical Sciences/Technology Preoperative Care - methods Prospective Studies Surgery Surgical Oncology |
| title | Clinical comparison of automated and manual keratometry in pre-operative ocular biometry |
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