Ultrasonographic measurement of induced myopia associated with capsular bag distention syndrome
Identifieur interne : 007C53 ( Main/Curation ); précédent : 007C52; suivant : 007C54Ultrasonographic measurement of induced myopia associated with capsular bag distention syndrome
Auteurs : Andrew L. Sorenson [États-Unis] ; Jack T. Holladay [États-Unis] ; Terry Kim [États-Unis] ; Cynthia J. Kendall [États-Unis] ; Alan N. Carlson [États-Unis]Source :
- Ophthalmology [ 0161-6420 ] ; 2000.
Abstract
Objective To determine the causes of postoperative myopia associated with capsular bag distention syndrome (CBDS) and characterize the associated findings.Design Prospective, multicenter, nonrandomized, comparative (self-controlled) trial.Participants Six eyes from six patients had CBDS develop after phacoemulsification and posterior chamber intraocular lens implantation.Methods Keratometric values, axial length, visual acuity, and manifest refraction were assessed in each eye. Using 20-MHz (I3SYSTEM-ABD, Innovative Imaging Inc, Sacramento, CA) and 50-MHz (Ultrasound Biomicroscope, Zeiss Humphrey Systems, Dublin, CA) ultrasonographic probes, images and measurements of the anterior segment were obtained. After neodymium:yttrium–aluminum–garnet (Nd:YAG) capsulotomy, these measures were repeated and correlated with predicted and actual refractive changes.Main outcome measures Uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), manifest refraction, and anterior chamber depth before and after treatment of CBDS.Results Although intended postoperative refraction averaged −0.58 diopters (D) (range, −0.12 to −1.63 D), eyes with CBDS had an average spherical equivalent refraction of −2.35 D (range, +0.13 to −4.50 D), P < 0.05 (one-tailed, paired t test). BCVA averaged 20/24 (range, 20/15–20/40-1), but UCVA averaged 20/133 (range, 20/60 to 20/400). Average distance from the corneal surface to the anterior intraocular lens (IOL) optic surface was 3.55 mm in eyes with CBDS, and 4.30 mm after Nd:YAG capsulotomy. Posterior movement of the IOL optic after capsulotomy accounted for 1.23 D of hyperopic shift or 82% of the CBDS-induced myopia. Treatment of CBDS resulted in both improved UCVA and BCVA. Nd:YAG capsulotomy also released the colloidal suspension within the capsular bag posterior to the IOL optic. The incidence of CBDS was 0.3% in one of the practices reviewed.Conclusions Capsular bag distention syndrome includes unexpected myopia and poor UCVA after cataract surgery with lens implantation in cases involving a continuous capsulorhexis. A dramatic posterior distention of the posterior capsule is observed, as well as anterior chamber shallowing, tight apposition of the iris to the IOL, and anterior bowing of the iris. A slightly turbid colloidal suspension behind the IOL implant and late posterior capsular fibrosis are also observed. Timely treatment of CBDS can correct unwanted myopia, improve UCVA and BCVA, and restore normal anatomic relationships in the eye.
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DOI: 10.1016/S0161-6420(00)00020-8
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<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Ultrasonographic measurement of induced myopia associated with capsular bag distention syndrome</title><author><name sortKey="Sorenson, Andrew L" sort="Sorenson, Andrew L" uniqKey="Sorenson A" first="Andrew L" last="Sorenson">Andrew L. Sorenson</name></author><author><name sortKey="Holladay, Jack T" sort="Holladay, Jack T" uniqKey="Holladay J" first="Jack T" last="Holladay">Jack T. Holladay</name></author><author><name sortKey="Kim, Terry" sort="Kim, Terry" uniqKey="Kim T" first="Terry" last="Kim">Terry Kim</name></author><author><name sortKey="Kendall, Cynthia J" sort="Kendall, Cynthia J" uniqKey="Kendall C" first="Cynthia J" last="Kendall">Cynthia J. Kendall</name></author><author><name sortKey="Carlson, Alan N" sort="Carlson, Alan N" uniqKey="Carlson A" first="Alan N" last="Carlson">Alan N. Carlson</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:E381218C6F8EB7E8D3415E40D272CB1925680E1B</idno><date when="2000" year="2000">2000</date><idno type="doi">10.1016/S0161-6420(00)00020-8</idno><idno type="url">https://api.istex.fr/document/E381218C6F8EB7E8D3415E40D272CB1925680E1B/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">003259</idno><idno type="wicri:Area/Istex/Curation">003259</idno><idno type="wicri:Area/Istex/Checkpoint">002F92</idno><idno type="wicri:doubleKey">0161-6420:2000:Sorenson A:ultrasonographic:measurement:of</idno><idno type="wicri:Area/Main/Merge">008339</idno><idno type="wicri:Area/Main/Curation">007C53</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Ultrasonographic measurement of induced myopia associated with capsular bag distention syndrome</title><author><name sortKey="Sorenson, Andrew L" sort="Sorenson, Andrew L" uniqKey="Sorenson A" first="Andrew L" last="Sorenson">Andrew L. Sorenson</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Duke University Eye Center, Durham, North Carolina</wicri:regionArea><placeName><region type="state">Caroline du Nord</region></placeName></affiliation></author><author><name sortKey="Holladay, Jack T" sort="Holladay, Jack T" uniqKey="Holladay J" first="Jack T" last="Holladay">Jack T. Holladay</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>University of Texas, Houston, Texas</wicri:regionArea><placeName><region type="state">Texas</region></placeName></affiliation></author><author><name sortKey="Kim, Terry" sort="Kim, Terry" uniqKey="Kim T" first="Terry" last="Kim">Terry Kim</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Duke University Eye Center, Durham, North Carolina</wicri:regionArea><placeName><region type="state">Caroline du Nord</region></placeName></affiliation></author><author><name sortKey="Kendall, Cynthia J" sort="Kendall, Cynthia J" uniqKey="Kendall C" first="Cynthia J" last="Kendall">Cynthia J. Kendall</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Innovative Imaging Inc., Sacramento, California</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Carlson, Alan N" sort="Carlson, Alan N" uniqKey="Carlson A" first="Alan N" last="Carlson">Alan N. Carlson</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Duke University Eye Center, Durham, North Carolina</wicri:regionArea><placeName><region type="state">Caroline du Nord</region></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Ophthalmology</title><title level="j" type="abbrev">OPHTHA</title><idno type="ISSN">0161-6420</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2000">2000</date><biblScope unit="volume">107</biblScope><biblScope unit="issue">5</biblScope><biblScope unit="page" from="902">902</biblScope><biblScope unit="page" to="908">908</biblScope></imprint><idno type="ISSN">0161-6420</idno></series><idno type="istex">E381218C6F8EB7E8D3415E40D272CB1925680E1B</idno><idno type="DOI">10.1016/S0161-6420(00)00020-8</idno><idno type="PII">S0161-6420(00)00020-8</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0161-6420</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Objective To determine the causes of postoperative myopia associated with capsular bag distention syndrome (CBDS) and characterize the associated findings.Design Prospective, multicenter, nonrandomized, comparative (self-controlled) trial.Participants Six eyes from six patients had CBDS develop after phacoemulsification and posterior chamber intraocular lens implantation.Methods Keratometric values, axial length, visual acuity, and manifest refraction were assessed in each eye. Using 20-MHz (I3SYSTEM-ABD, Innovative Imaging Inc, Sacramento, CA) and 50-MHz (Ultrasound Biomicroscope, Zeiss Humphrey Systems, Dublin, CA) ultrasonographic probes, images and measurements of the anterior segment were obtained. After neodymium:yttrium–aluminum–garnet (Nd:YAG) capsulotomy, these measures were repeated and correlated with predicted and actual refractive changes.Main outcome measures Uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), manifest refraction, and anterior chamber depth before and after treatment of CBDS.Results Although intended postoperative refraction averaged −0.58 diopters (D) (range, −0.12 to −1.63 D), eyes with CBDS had an average spherical equivalent refraction of −2.35 D (range, +0.13 to −4.50 D), P < 0.05 (one-tailed, paired t test). BCVA averaged 20/24 (range, 20/15–20/40-1), but UCVA averaged 20/133 (range, 20/60 to 20/400). Average distance from the corneal surface to the anterior intraocular lens (IOL) optic surface was 3.55 mm in eyes with CBDS, and 4.30 mm after Nd:YAG capsulotomy. Posterior movement of the IOL optic after capsulotomy accounted for 1.23 D of hyperopic shift or 82% of the CBDS-induced myopia. Treatment of CBDS resulted in both improved UCVA and BCVA. Nd:YAG capsulotomy also released the colloidal suspension within the capsular bag posterior to the IOL optic. The incidence of CBDS was 0.3% in one of the practices reviewed.Conclusions Capsular bag distention syndrome includes unexpected myopia and poor UCVA after cataract surgery with lens implantation in cases involving a continuous capsulorhexis. A dramatic posterior distention of the posterior capsule is observed, as well as anterior chamber shallowing, tight apposition of the iris to the IOL, and anterior bowing of the iris. A slightly turbid colloidal suspension behind the IOL implant and late posterior capsular fibrosis are also observed. Timely treatment of CBDS can correct unwanted myopia, improve UCVA and BCVA, and restore normal anatomic relationships in the eye.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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