Optical and ultrasound measurement of axial length and anterior chamber depth for intraocular lens power calculation
To evaluate the precision, reproducibility, and applicability of an optical method based on partial coherence interferometry for intraocular lens (IOL) power calculation. Ultrasound laboratory of a university eye hospital. A prospective comparison of measurements made by the IOLMaster optical instru...
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| Veröffentlicht in: | Journal of cataract and refractive surgery 2003, Vol.29 (1), p.85-88 |
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| creator | Németh, János Fekete, Orsolya Pesztenlehrer, Norbert |
| description | To evaluate the precision, reproducibility, and applicability of an optical method based on partial coherence interferometry for intraocular lens (IOL) power calculation.
Ultrasound laboratory of a university eye hospital.
A prospective comparison of measurements made by the IOLMaster optical instrument (Carl Zeiss) and Ultrascan Digital 2000 contact ultrasound A-scan (Alcon) for IOL calculations was performed. Examined were 255 eyes of 134 persons (204 phakic, 47 pseudophakic, and 4 aphakic). The mean age of the patients was 67.9 years (range 7 to 94 years).
The IOLMaster measurements were successful in more than 80% of cases: in 82%, 99%, and 99% for axial length (AL), anterior chamber depth (ACD), and keratometry measurements, respectively. The reproducibility of the AL and ACD measurements was very high (coefficient of variation 0.13% and 2.20%, respectively). The AL and ACD values were significantly larger with the IOLMaster (
P < .001) than with the Ultrascan Digital 2000. The correlation between ultrasound and optical AL measurements was high (
r = 0.985;
P < .001); however, there was no correlation between ACD measurements (
r = 0.079;
P = .397). The corneal refractive power measurements of a Javal-type keratometer and the IOLMaster were highly correlated (
r = 0.955;
P < .001), with a mean difference of 0.2 diopter.
The results show that measurements for IOL calculation are easy and precise with the optical method. It is a noncontact method, so no anesthesia is needed and there is no risk of infection. |
| doi_str_mv | 10.1016/S0886-3350(02)01500-6 |
| format | Article |
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Ultrasound laboratory of a university eye hospital.
A prospective comparison of measurements made by the IOLMaster optical instrument (Carl Zeiss) and Ultrascan Digital 2000 contact ultrasound A-scan (Alcon) for IOL calculations was performed. Examined were 255 eyes of 134 persons (204 phakic, 47 pseudophakic, and 4 aphakic). The mean age of the patients was 67.9 years (range 7 to 94 years).
The IOLMaster measurements were successful in more than 80% of cases: in 82%, 99%, and 99% for axial length (AL), anterior chamber depth (ACD), and keratometry measurements, respectively. The reproducibility of the AL and ACD measurements was very high (coefficient of variation 0.13% and 2.20%, respectively). The AL and ACD values were significantly larger with the IOLMaster (
P < .001) than with the Ultrascan Digital 2000. The correlation between ultrasound and optical AL measurements was high (
r = 0.985;
P < .001); however, there was no correlation between ACD measurements (
r = 0.079;
P = .397). The corneal refractive power measurements of a Javal-type keratometer and the IOLMaster were highly correlated (
r = 0.955;
P < .001), with a mean difference of 0.2 diopter.
The results show that measurements for IOL calculation are easy and precise with the optical method. It is a noncontact method, so no anesthesia is needed and there is no risk of infection.</description><identifier>ISSN: 0886-3350</identifier><identifier>EISSN: 1873-4502</identifier><identifier>DOI: 10.1016/S0886-3350(02)01500-6</identifier><identifier>PMID: 12551672</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Adolescent ; Adult ; Aged ; Aged, 80 and over ; Anterior Chamber - diagnostic imaging ; Anterior Chamber - pathology ; Aphakia - diagnostic imaging ; Aphakia - pathology ; Aphakia - physiopathology ; Child ; Cornea - physiopathology ; Female ; Humans ; Interferometry ; Lenses, Intraocular ; Male ; Middle Aged ; Optics and Photonics ; Prospective Studies ; Pseudophakia - diagnostic imaging ; Pseudophakia - pathology ; Pseudophakia - physiopathology ; Refraction, Ocular ; Reproducibility of Results ; Ultrasonography</subject><ispartof>Journal of cataract and refractive surgery, 2003, Vol.29 (1), p.85-88</ispartof><rights>2003 ASCRS and ESCRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c427t-42d85bc7d04ae416e6c6654de11e0256c57150d680b26deb88d10aa0f78cd83c3</citedby><cites>FETCH-LOGICAL-c427t-42d85bc7d04ae416e6c6654de11e0256c57150d680b26deb88d10aa0f78cd83c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0886-3350(02)01500-6$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,778,782,3539,4012,27910,27911,27912,45982,58537</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12551672$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Németh, János</creatorcontrib><creatorcontrib>Fekete, Orsolya</creatorcontrib><creatorcontrib>Pesztenlehrer, Norbert</creatorcontrib><title>Optical and ultrasound measurement of axial length and anterior chamber depth for intraocular lens power calculation</title><title>Journal of cataract and refractive surgery</title><addtitle>J Cataract Refract Surg</addtitle><description>To evaluate the precision, reproducibility, and applicability of an optical method based on partial coherence interferometry for intraocular lens (IOL) power calculation.
Ultrasound laboratory of a university eye hospital.
A prospective comparison of measurements made by the IOLMaster optical instrument (Carl Zeiss) and Ultrascan Digital 2000 contact ultrasound A-scan (Alcon) for IOL calculations was performed. Examined were 255 eyes of 134 persons (204 phakic, 47 pseudophakic, and 4 aphakic). The mean age of the patients was 67.9 years (range 7 to 94 years).
The IOLMaster measurements were successful in more than 80% of cases: in 82%, 99%, and 99% for axial length (AL), anterior chamber depth (ACD), and keratometry measurements, respectively. The reproducibility of the AL and ACD measurements was very high (coefficient of variation 0.13% and 2.20%, respectively). The AL and ACD values were significantly larger with the IOLMaster (
P < .001) than with the Ultrascan Digital 2000. The correlation between ultrasound and optical AL measurements was high (
r = 0.985;
P < .001); however, there was no correlation between ACD measurements (
r = 0.079;
P = .397). The corneal refractive power measurements of a Javal-type keratometer and the IOLMaster were highly correlated (
r = 0.955;
P < .001), with a mean difference of 0.2 diopter.
The results show that measurements for IOL calculation are easy and precise with the optical method. It is a noncontact method, so no anesthesia is needed and there is no risk of infection.</description><subject>Adolescent</subject><subject>Adult</subject><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Anterior Chamber - diagnostic imaging</subject><subject>Anterior Chamber - pathology</subject><subject>Aphakia - diagnostic imaging</subject><subject>Aphakia - pathology</subject><subject>Aphakia - physiopathology</subject><subject>Child</subject><subject>Cornea - physiopathology</subject><subject>Female</subject><subject>Humans</subject><subject>Interferometry</subject><subject>Lenses, Intraocular</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Optics and Photonics</subject><subject>Prospective Studies</subject><subject>Pseudophakia - diagnostic imaging</subject><subject>Pseudophakia - pathology</subject><subject>Pseudophakia - physiopathology</subject><subject>Refraction, Ocular</subject><subject>Reproducibility of Results</subject><subject>Ultrasonography</subject><issn>0886-3350</issn><issn>1873-4502</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkE1P3DAQhq2qqCy0P6EopwoOgbETO-6pQiu-pJX2QHu2HHvSNUri1HYK_Hu8H6LHnmY087zzal5CvlK4pEDF1SNIKcqq4nAO7AIoByjFB7KgsqnKmgP7SBbvyDE5ifEJAGpW8U_kmDLOqWjYgqT1lJzRfaFHW8x9Cjr6ObcD6jgHHHBMhe8K_eIy0-P4O212qB4TBudDYTZ6aDEUFqe86vLEjfmKN3Ovw1YRi8k_ZyCbbGfJ-fEzOep0H_HLoZ6SX7c3P5f35Wp997C8XpWmZk0qa2Ylb01jodZYU4HCCMFri5QiMC4Mb_LbVkhombDYSmkpaA1dI42VlalOybf93Sn4PzPGpAYXDfa9HtHPUTXseyNoxTLI96AJPsaAnZqCG3R4VRTUNm61i1tts1TA1C5uJbLu7GAwtwPaf6pDvhn4sQcwv_nXYVDROBwNWhfQJGW9-4_FG2bYkWU</recordid><startdate>2003</startdate><enddate>2003</enddate><creator>Németh, János</creator><creator>Fekete, Orsolya</creator><creator>Pesztenlehrer, Norbert</creator><general>Elsevier Inc</general><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>2003</creationdate><title>Optical and ultrasound measurement of axial length and anterior chamber depth for intraocular lens power calculation</title><author>Németh, János ; Fekete, Orsolya ; Pesztenlehrer, Norbert</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c427t-42d85bc7d04ae416e6c6654de11e0256c57150d680b26deb88d10aa0f78cd83c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Adolescent</topic><topic>Adult</topic><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>Anterior Chamber - diagnostic imaging</topic><topic>Anterior Chamber - pathology</topic><topic>Aphakia - diagnostic imaging</topic><topic>Aphakia - pathology</topic><topic>Aphakia - physiopathology</topic><topic>Child</topic><topic>Cornea - physiopathology</topic><topic>Female</topic><topic>Humans</topic><topic>Interferometry</topic><topic>Lenses, Intraocular</topic><topic>Male</topic><topic>Middle Aged</topic><topic>Optics and Photonics</topic><topic>Prospective Studies</topic><topic>Pseudophakia - diagnostic imaging</topic><topic>Pseudophakia - pathology</topic><topic>Pseudophakia - physiopathology</topic><topic>Refraction, Ocular</topic><topic>Reproducibility of Results</topic><topic>Ultrasonography</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Németh, János</creatorcontrib><creatorcontrib>Fekete, Orsolya</creatorcontrib><creatorcontrib>Pesztenlehrer, Norbert</creatorcontrib><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>Journal of cataract and refractive surgery</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Németh, János</au><au>Fekete, Orsolya</au><au>Pesztenlehrer, Norbert</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Optical and ultrasound measurement of axial length and anterior chamber depth for intraocular lens power calculation</atitle><jtitle>Journal of cataract and refractive surgery</jtitle><addtitle>J Cataract Refract Surg</addtitle><date>2003</date><risdate>2003</risdate><volume>29</volume><issue>1</issue><spage>85</spage><epage>88</epage><pages>85-88</pages><issn>0886-3350</issn><eissn>1873-4502</eissn><abstract>To evaluate the precision, reproducibility, and applicability of an optical method based on partial coherence interferometry for intraocular lens (IOL) power calculation.
Ultrasound laboratory of a university eye hospital.
A prospective comparison of measurements made by the IOLMaster optical instrument (Carl Zeiss) and Ultrascan Digital 2000 contact ultrasound A-scan (Alcon) for IOL calculations was performed. Examined were 255 eyes of 134 persons (204 phakic, 47 pseudophakic, and 4 aphakic). The mean age of the patients was 67.9 years (range 7 to 94 years).
The IOLMaster measurements were successful in more than 80% of cases: in 82%, 99%, and 99% for axial length (AL), anterior chamber depth (ACD), and keratometry measurements, respectively. The reproducibility of the AL and ACD measurements was very high (coefficient of variation 0.13% and 2.20%, respectively). The AL and ACD values were significantly larger with the IOLMaster (
P < .001) than with the Ultrascan Digital 2000. The correlation between ultrasound and optical AL measurements was high (
r = 0.985;
P < .001); however, there was no correlation between ACD measurements (
r = 0.079;
P = .397). The corneal refractive power measurements of a Javal-type keratometer and the IOLMaster were highly correlated (
r = 0.955;
P < .001), with a mean difference of 0.2 diopter.
The results show that measurements for IOL calculation are easy and precise with the optical method. It is a noncontact method, so no anesthesia is needed and there is no risk of infection.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>12551672</pmid><doi>10.1016/S0886-3350(02)01500-6</doi><tpages>4</tpages></addata></record> |
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| ispartof | Journal of cataract and refractive surgery, 2003, Vol.29 (1), p.85-88 |
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| language | eng |
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| source | MEDLINE; ScienceDirect Journals (5 years ago - present) |
| subjects | Adolescent Adult Aged Aged, 80 and over Anterior Chamber - diagnostic imaging Anterior Chamber - pathology Aphakia - diagnostic imaging Aphakia - pathology Aphakia - physiopathology Child Cornea - physiopathology Female Humans Interferometry Lenses, Intraocular Male Middle Aged Optics and Photonics Prospective Studies Pseudophakia - diagnostic imaging Pseudophakia - pathology Pseudophakia - physiopathology Refraction, Ocular Reproducibility of Results Ultrasonography |
| title | Optical and ultrasound measurement of axial length and anterior chamber depth for intraocular lens power calculation |
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