OPTICS OF CONDUCTIVE KERATOPLASTY: IMPLICATIONS FOR PRESBYOPIA MANAGEMENT
Identifieur interne : 001857 ( Main/Exploration ); précédent : 001856; suivant : 001858OPTICS OF CONDUCTIVE KERATOPLASTY: IMPLICATIONS FOR PRESBYOPIA MANAGEMENT
Auteurs : Peter S. HershSource :
- Transactions of the American Ophthalmological Society [ 0065-9533 ] ; 2005.
Abstract
To define the corneal optics of conductive keratoplasty (CK) and assess the clinical implications for hyperopia and presbyopia management.
Four analyses were done. (1) Multifocal effects: In a prospective study of CK, uncorrected visual acuity (UCVA) for a given refractive error in 72 postoperative eyes was compared to control eyes. (2) Surgically induced astigmatism (SIA): 203 eyes were analyzed for magnitude and axis of SIA. (3) Higher-order optical aberrations: Corneal higher-order optical aberrations were assessed for 36 eyes after CK and a similar patient population after hyperopic laser in situ keratomileusis (LASIK). (4) Presbyopia clinical trial: Visual acuity, refractive result, and patient questionnaires were analyzed for 150 subjects in a prospective, multicenter clinical trial of presbyopia management with CK.
(1) 63% and 82% of eyes after CK had better UCVA at distance and near, respectively, than controls. (2) The mean SIA was 0.23 diopter (D) steepening at 175° (
CK seems to produce functional corneal multifocality with definable introduction of SIA and higher-order optical aberrations, and development of a more prolate corneal contour. These optical factors may militate toward improved near vision function.
Url:
PubMed: 17057812
PubMed Central: 1447583
Affiliations:
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Hersh</name><affiliation><nlm:aff id="af1-1545-6110_v103_p412">From the Department of Ophthalmology and Visual Sciences, UMDNJ—New Jersey Medical School, Newark, New Jersey, and the Cornea and Laser Eye Institute–Hersh Vision Group, Teaneck, New Jersey.</nlm:aff><wicri:noCountry code="subfield">New Jersey.</wicri:noCountry></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">17057812</idno><idno type="pmc">1447583</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1447583</idno><idno type="RBID">PMC:1447583</idno><date when="2005">2005</date><idno type="wicri:Area/Pmc/Corpus">000299</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000299</idno><idno type="wicri:Area/Pmc/Curation">000299</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000299</idno><idno type="wicri:Area/Pmc/Checkpoint">000365</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000365</idno><idno type="wicri:Area/Ncbi/Merge">000164</idno><idno type="wicri:Area/Ncbi/Curation">000164</idno><idno type="wicri:Area/Ncbi/Checkpoint">000164</idno><idno type="wicri:doubleKey">0065-9533:2005:Hersh P:optics:of:conductive</idno><idno type="wicri:Area/Main/Merge">001912</idno><idno type="wicri:Area/Main/Curation">001857</idno><idno type="wicri:Area/Main/Exploration">001857</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">OPTICS OF CONDUCTIVE KERATOPLASTY: IMPLICATIONS FOR PRESBYOPIA MANAGEMENT</title><author><name sortKey="Hersh, Peter S" sort="Hersh, Peter S" uniqKey="Hersh P" first="Peter S" last="Hersh">Peter S. Hersh</name><affiliation><nlm:aff id="af1-1545-6110_v103_p412">From the Department of Ophthalmology and Visual Sciences, UMDNJ—New Jersey Medical School, Newark, New Jersey, and the Cornea and Laser Eye Institute–Hersh Vision Group, Teaneck, New Jersey.</nlm:aff><wicri:noCountry code="subfield">New Jersey.</wicri:noCountry></affiliation></author></analytic><series><title level="j">Transactions of the American Ophthalmological Society</title><idno type="ISSN">0065-9533</idno><idno type="eISSN">1545-6110</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Purpose</title><p>To define the corneal optics of conductive keratoplasty (CK) and assess the clinical implications for hyperopia and presbyopia management.</p></sec><sec><title>Methods</title><p>Four analyses were done. (1) Multifocal effects: In a prospective study of CK, uncorrected visual acuity (UCVA) for a given refractive error in 72 postoperative eyes was compared to control eyes. (2) Surgically induced astigmatism (SIA): 203 eyes were analyzed for magnitude and axis of SIA. (3) Higher-order optical aberrations: Corneal higher-order optical aberrations were assessed for 36 eyes after CK and a similar patient population after hyperopic laser in situ keratomileusis (LASIK). (4) Presbyopia clinical trial: Visual acuity, refractive result, and patient questionnaires were analyzed for 150 subjects in a prospective, multicenter clinical trial of presbyopia management with CK.</p></sec><sec><title>Results</title><p>(1) 63% and 82% of eyes after CK had better UCVA at distance and near, respectively, than controls. (2) The mean SIA was 0.23 diopter (D) steepening at 175° (<italic>P</italic> < .001); mean magnitude was 0.66 D (SD, 0.43 D). (3) After CK, composite fourth- and sixth-order spherical aberration increased; change in (Z<sup>12</sup>) spherical aberration alone was not statistically significant. When compared to hyperopic LASIK, there was a statistically significant increase in composite fourth- and sixth-order spherical aberration (<italic>P</italic> < .01) and spherical aberration (Z<sup>12</sup>) alone (<italic>P</italic> < .02); spherical aberration change was more prolate after CK. (4) After the CK monovision procedure, 80% of patients had J3 or better binocular UCVA at near; 84% of patients were satisfied. Satisfaction was associated with near UCVA of J3 or better in the monovision eye (<italic>P</italic> = .001) and subjectively good postoperative depth perception (<italic>P</italic> = .038).</p></sec><sec><title>Conclusions</title><p>CK seems to produce functional corneal multifocality with definable introduction of SIA and higher-order optical aberrations, and development of a more prolate corneal contour. These optical factors may militate toward improved near vision function.</p></sec></div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Hersh, Peter S" sort="Hersh, Peter S" uniqKey="Hersh P" first="Peter S" last="Hersh">Peter S. Hersh</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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