Postoperative intraocular lens rotation
Identifieur interne : 008187 ( Main/Curation ); précédent : 008186; suivant : 008188Postoperative intraocular lens rotation
Auteurs : C. K Patel [Niger] ; Sue Ormonde ; Paul H. Rosen ; Anthony J. BronSource :
- Ophthalmology [ 0161-6420 ] ; 1999.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
- KwdEn :
- Capsulorhexis, Cataract, Comparative study, Complication, Foreign-Body Migration (etiology), Human, Humans, Iatrogenic, Implant, Intraocular lens, Lens Implantation, Intraocular, Lenses, Intraocular, Phacoemulsification, Posterior chamber, Postoperative, Postoperative Complications, Prospective Studies, Prosthesis Design, Rotation, Silicone Elastomers, Time Factors, Treatment.
- MESH :
Abstract
Objective To compare the postoperative rotation of plate and loop haptic implants of spherical power to ascertain the optimal design appropriate for toric intraocular lenses (IOLs).Design Randomized, controlled trial.Participants Forty-eight patients attending for routine cataract surgery by phacoemulsification.Method Patients with cataract as the only ocular disease were randomly implanted with plate or loop haptic implants after uncomplicated phacoemulsification. The baseline position of the IOL was determined from a video frame acquired at the conclusion of surgery. Postoperative IOL position was documented using digital retroillumination images at 2 weeks and 6 months after surgery. Capsular fusion patterns were recorded using slit-lamp biomicroscopy. Correlation of IOL rotation with axial length, capsular contraction, and fusion was attempted.Main outcome measures Early IOL rotation, occurring between surgery and 2 weeks after surgery, was graded as mild (<10°), moderate (10°< to <30°), or severe (>30°) by a semiobjective online comparison of the images. Late IOL rotation, occurring between 2 weeks and 6 months, was measured more precisely using software developed specifically for the study.Results Twenty-three patients were allocated the loop haptic and 25 the plate haptic IOL. The groups were comparable for demographic variables and numbers of patients excluded from analysis (P > 0.05). Five (24%) of 21 of plate haptic IOLs underwent severe early rotation compared to 2 (9%) of 22 loop haptics (P = 0.36). The median late rotation was 6.8° for loop haptics compared to 0.6° for plate haptics (P = 0.0073). Between 2 weeks and 6 months, anticlockwise rotation had occurred in 16 (89%) of 18 loop haptic IOLs compared to 11 (52%) of 21 plate haptic IOLs (P = 0.0081).Conclusions Plate haptic IOLs show greater rotational stability than do loop haptics made from polypropylene once capsular fusion has taken place. Loop haptics invariably rotate anticlockwise after 2 weeks.
Url:
DOI: 10.1016/S0161-6420(99)90504-3
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C. K Patel<affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation>Le document en format XML
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K" last="Patel">C. K Patel</name><affiliation wicri:level="1"><country wicri:rule="url">Niger</country></affiliation><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation></author><author><name sortKey="Ormonde, Sue" sort="Ormonde, Sue" uniqKey="Ormonde S" first="Sue" last="Ormonde">Sue Ormonde</name><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation></author><author><name sortKey="Rosen, Paul H" sort="Rosen, Paul H" uniqKey="Rosen P" first="Paul H" last="Rosen">Paul H. Rosen</name><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation></author><author><name sortKey="Bron, Anthony J" sort="Bron, Anthony J" uniqKey="Bron A" first="Anthony J" last="Bron">Anthony J. Bron</name><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></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="1999">1999</date><biblScope unit="volume">106</biblScope><biblScope unit="issue">11</biblScope><biblScope unit="page" from="2190">2190</biblScope><biblScope unit="page" to="2196">2196</biblScope></imprint><idno type="ISSN">0161-6420</idno></series><idno type="istex">45E1E9A291CFDEE5ED3FD411E0248AE9B107697A</idno><idno type="DOI">10.1016/S0161-6420(99)90504-3</idno><idno type="PII">S0161-6420(99)90504-3</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0161-6420</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Capsulorhexis</term><term>Cataract</term><term>Comparative study</term><term>Complication</term><term>Foreign-Body Migration (etiology)</term><term>Human</term><term>Humans</term><term>Iatrogenic</term><term>Implant</term><term>Intraocular lens</term><term>Lens Implantation, Intraocular</term><term>Lenses, Intraocular</term><term>Phacoemulsification</term><term>Posterior chamber</term><term>Postoperative</term><term>Postoperative Complications</term><term>Prospective Studies</term><term>Prosthesis Design</term><term>Rotation</term><term>Silicone Elastomers</term><term>Time Factors</term><term>Treatment</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Silicone Elastomers</term></keywords><keywords scheme="MESH" qualifier="etiology" xml:lang="en"><term>Foreign-Body Migration</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Capsulorhexis</term><term>Humans</term><term>Lens Implantation, Intraocular</term><term>Lenses, Intraocular</term><term>Phacoemulsification</term><term>Postoperative Complications</term><term>Prospective Studies</term><term>Prosthesis Design</term><term>Rotation</term><term>Time Factors</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Cataracte</term><term>Chambre postérieure</term><term>Complication</term><term>Etude comparative</term><term>Homme</term><term>Iatrogène</term><term>Implant</term><term>Lentille intraoculaire</term><term>Postopératoire</term><term>Rotation</term><term>Traitement</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Objective To compare the postoperative rotation of plate and loop haptic implants of spherical power to ascertain the optimal design appropriate for toric intraocular lenses (IOLs).Design Randomized, controlled trial.Participants Forty-eight patients attending for routine cataract surgery by phacoemulsification.Method Patients with cataract as the only ocular disease were randomly implanted with plate or loop haptic implants after uncomplicated phacoemulsification. The baseline position of the IOL was determined from a video frame acquired at the conclusion of surgery. Postoperative IOL position was documented using digital retroillumination images at 2 weeks and 6 months after surgery. Capsular fusion patterns were recorded using slit-lamp biomicroscopy. Correlation of IOL rotation with axial length, capsular contraction, and fusion was attempted.Main outcome measures Early IOL rotation, occurring between surgery and 2 weeks after surgery, was graded as mild (<10°), moderate (10°< to <30°), or severe (>30°) by a semiobjective online comparison of the images. Late IOL rotation, occurring between 2 weeks and 6 months, was measured more precisely using software developed specifically for the study.Results Twenty-three patients were allocated the loop haptic and 25 the plate haptic IOL. The groups were comparable for demographic variables and numbers of patients excluded from analysis (P > 0.05). Five (24%) of 21 of plate haptic IOLs underwent severe early rotation compared to 2 (9%) of 22 loop haptics (P = 0.36). The median late rotation was 6.8° for loop haptics compared to 0.6° for plate haptics (P = 0.0073). Between 2 weeks and 6 months, anticlockwise rotation had occurred in 16 (89%) of 18 loop haptic IOLs compared to 11 (52%) of 21 plate haptic IOLs (P = 0.0081).Conclusions Plate haptic IOLs show greater rotational stability than do loop haptics made from polypropylene once capsular fusion has taken place. Loop haptics invariably rotate anticlockwise after 2 weeks.</div></front></TEI><double idat="0161-6420:1999:Patel C:postoperative:intraocular:lens"><INIST><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Postoperative intraocular lens rotation : A randomized comparison of Plate and loop haptic implants. Discussion</title><author><name sortKey="Patel, C K" sort="Patel, C K" uniqKey="Patel C" first="C. K." last="Patel">C. K. Patel</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Oxford Eye Hospital, Radcliffe Infirmary</s1><s2>Oxford</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Ormonde, S" sort="Ormonde, S" uniqKey="Ormonde S" first="S." last="Ormonde">S. Ormonde</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Oxford Eye Hospital, Radcliffe Infirmary</s1><s2>Oxford</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Rosen, P H" sort="Rosen, P H" uniqKey="Rosen P" first="P. H." last="Rosen">P. H. Rosen</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Oxford Eye Hospital, Radcliffe Infirmary</s1><s2>Oxford</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Bron, A J" sort="Bron, A J" uniqKey="Bron A" first="A. J." last="Bron">A. J. Bron</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Oxford Eye Hospital, Radcliffe Infirmary</s1><s2>Oxford</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Apple, D J" sort="Apple, D J" uniqKey="Apple D" first="D. J." last="Apple">D. J. Apple</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Storm Eye Institute, Department of Ophthalmology, Medical College of South Carolina, 167 Ashley Avenue, Box 250676</s1><s2>Charleston, SC 29425</s2><s3>USA</s3><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Caroline du Sud</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">00-0006847</idno><date when="1999">1999</date><idno type="stanalyst">PASCAL 00-0006847 INIST</idno><idno type="RBID">Pascal:00-0006847</idno><idno type="wicri:Area/PascalFrancis/Corpus">001513</idno><idno type="wicri:Area/PascalFrancis/Curation">000000</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">001266</idno><idno type="wicri:doubleKey">0161-6420:1999:Patel C:postoperative:intraocular:lens</idno><idno type="wicri:Area/Main/Merge">008B42</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Postoperative intraocular lens rotation : A randomized comparison of Plate and loop haptic implants. Discussion</title><author><name sortKey="Patel, C K" sort="Patel, C K" uniqKey="Patel C" first="C. K." last="Patel">C. K. Patel</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Oxford Eye Hospital, Radcliffe Infirmary</s1><s2>Oxford</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Ormonde, S" sort="Ormonde, S" uniqKey="Ormonde S" first="S." last="Ormonde">S. Ormonde</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Oxford Eye Hospital, Radcliffe Infirmary</s1><s2>Oxford</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Rosen, P H" sort="Rosen, P H" uniqKey="Rosen P" first="P. H." last="Rosen">P. H. Rosen</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Oxford Eye Hospital, Radcliffe Infirmary</s1><s2>Oxford</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Bron, A J" sort="Bron, A J" uniqKey="Bron A" first="A. J." last="Bron">A. J. Bron</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Oxford Eye Hospital, Radcliffe Infirmary</s1><s2>Oxford</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Apple, D J" sort="Apple, D J" uniqKey="Apple D" first="D. J." last="Apple">D. J. Apple</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Storm Eye Institute, Department of Ophthalmology, Medical College of South Carolina, 167 Ashley Avenue, Box 250676</s1><s2>Charleston, SC 29425</s2><s3>USA</s3><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Caroline du Sud</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Ophthalmology : (Rochester, MN)</title><title level="j" type="abbreviated">Ophthalmology : (Rochester MN)</title><idno type="ISSN">0161-6420</idno><imprint><date when="1999">1999</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Ophthalmology : (Rochester, MN)</title><title level="j" type="abbreviated">Ophthalmology : (Rochester MN)</title><idno type="ISSN">0161-6420</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cataract</term><term>Comparative study</term><term>Complication</term><term>Human</term><term>Iatrogenic</term><term>Implant</term><term>Intraocular lens</term><term>Posterior chamber</term><term>Postoperative</term><term>Rotation</term><term>Treatment</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Lentille intraoculaire</term><term>Chambre postérieure</term><term>Cataracte</term><term>Traitement</term><term>Rotation</term><term>Postopératoire</term><term>Complication</term><term>Iatrogène</term><term>Etude comparative</term><term>Implant</term><term>Homme</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Objective: To compare the postoperative rotation of plate and loop haptic implants of spherical power to ascertain the optimal design appropriate for toric intraocular lenses (lOLs). Design: Randomized, controlled trial. Participants: Forty-eight patients attending for routine cataract surgery by phacoemulsification. Method: Patients with cataract as the only ocular disease were randomly implanted with plate or loop haptic implants after uncomplicated phacoemulsification. The baseline position of the IOL was determined from a video frame acquired at the conclusion of surgery. Postoperative IOL position was documented using digital retroillumination images at 2 weeks and 6 months after surgery. Capsular fusion patterns were recorded using slit-lamp biomicroscopy. Correlation of IOL rotation with axial length, capsular contraction, and fusion was attempted. Main Outcome Measures: Early IOL rotation, occurring between surgery and 2 weeks after surgery, was graded as mild (<10°), moderate (10°< to <30°), or severe (>30°) by a semiobjective online comparison of the images. Late IOL rotation, occurring between 2 weeks and 6 months, was measured more precisely using software developed specifically for the study. Results: Twenty-three patients were allocated the loop haptic and 25 the plate haptic IOL. The groups were comparable for demographic variables and numbers of patients excluded from analysis (P > 0.05). Five (24%) of 21 of plate haptic lOLs underwent severe early rotation compared to 2 (9%) of 22 loop haptics (P = 0.36). The median late rotation was 6.8° for loop haptics compared to 0.6° for plate haptics (P = 0.0073). Between 2 weeks and 6 months, anticlockwise rotation had occurred in 16 (89%) of 18 loop haptic lOLs compared to 11 (52%) of 21 plate haptic lOLs (P = 0.0081). Conclusions: Plate haptic lOLs show greater rotational stability than do loop haptics made from polypropylene once capsular fusion has taken place. Loop haptics invariably rotate anticlockwise after 2 weeks.</div></front></TEI></INIST><ISTEX><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Postoperative intraocular lens rotation</title><author><name sortKey="Patel, C K" sort="Patel, C K" uniqKey="Patel C" first="C. K" last="Patel">C. K Patel</name></author><author><name sortKey="Ormonde, Sue" sort="Ormonde, Sue" uniqKey="Ormonde S" first="Sue" last="Ormonde">Sue Ormonde</name></author><author><name sortKey="Rosen, Paul H" sort="Rosen, Paul H" uniqKey="Rosen P" first="Paul H" last="Rosen">Paul H. Rosen</name></author><author><name sortKey="Bron, Anthony J" sort="Bron, Anthony J" uniqKey="Bron A" first="Anthony J" last="Bron">Anthony J. Bron</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:45E1E9A291CFDEE5ED3FD411E0248AE9B107697A</idno><date when="1999" year="1999">1999</date><idno type="doi">10.1016/S0161-6420(99)90504-3</idno><idno type="url">https://api.istex.fr/document/45E1E9A291CFDEE5ED3FD411E0248AE9B107697A/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002193</idno><idno type="wicri:Area/Istex/Curation">002193</idno><idno type="wicri:Area/Istex/Checkpoint">003465</idno><idno type="wicri:doubleKey">0161-6420:1999:Patel C:postoperative:intraocular:lens</idno><idno type="wicri:source">PubMed</idno><idno type="RBID">pubmed:10571358</idno><idno type="wicri:Area/PubMed/Corpus">001E74</idno><idno type="wicri:Area/PubMed/Curation">001E74</idno><idno type="wicri:Area/PubMed/Checkpoint">001C21</idno><idno type="wicri:Area/Ncbi/Merge">000082</idno><idno type="wicri:Area/Ncbi/Curation">000082</idno><idno type="wicri:Area/Ncbi/Checkpoint">000082</idno><idno type="wicri:doubleKey">0161-6420:1999:Patel C:postoperative:intraocular:lens</idno><idno type="wicri:Area/Main/Merge">008936</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Postoperative intraocular lens rotation</title><author><name sortKey="Patel, C K" sort="Patel, C K" uniqKey="Patel C" first="C. K" last="Patel">C. K Patel</name><affiliation wicri:level="1"><country wicri:rule="url">Niger</country></affiliation><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation></author><author><name sortKey="Ormonde, Sue" sort="Ormonde, Sue" uniqKey="Ormonde S" first="Sue" last="Ormonde">Sue Ormonde</name><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation></author><author><name sortKey="Rosen, Paul H" sort="Rosen, Paul H" uniqKey="Rosen P" first="Paul H" last="Rosen">Paul H. Rosen</name><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></affiliation></author><author><name sortKey="Bron, Anthony J" sort="Bron, Anthony J" uniqKey="Bron A" first="Anthony J" last="Bron">Anthony J. Bron</name><affiliation><wicri:noCountry code="subField">England UK</wicri:noCountry></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="1999">1999</date><biblScope unit="volume">106</biblScope><biblScope unit="issue">11</biblScope><biblScope unit="page" from="2190">2190</biblScope><biblScope unit="page" to="2196">2196</biblScope></imprint><idno type="ISSN">0161-6420</idno></series><idno type="istex">45E1E9A291CFDEE5ED3FD411E0248AE9B107697A</idno><idno type="DOI">10.1016/S0161-6420(99)90504-3</idno><idno type="PII">S0161-6420(99)90504-3</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0161-6420</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Capsulorhexis</term><term>Foreign-Body Migration (etiology)</term><term>Humans</term><term>Lens Implantation, Intraocular</term><term>Lenses, Intraocular</term><term>Phacoemulsification</term><term>Postoperative Complications</term><term>Prospective Studies</term><term>Prosthesis Design</term><term>Rotation</term><term>Silicone Elastomers</term><term>Time Factors</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Silicone Elastomers</term></keywords><keywords scheme="MESH" qualifier="etiology" xml:lang="en"><term>Foreign-Body Migration</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Capsulorhexis</term><term>Humans</term><term>Lens Implantation, Intraocular</term><term>Lenses, Intraocular</term><term>Phacoemulsification</term><term>Postoperative Complications</term><term>Prospective Studies</term><term>Prosthesis Design</term><term>Rotation</term><term>Time Factors</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Objective To compare the postoperative rotation of plate and loop haptic implants of spherical power to ascertain the optimal design appropriate for toric intraocular lenses (IOLs).Design Randomized, controlled trial.Participants Forty-eight patients attending for routine cataract surgery by phacoemulsification.Method Patients with cataract as the only ocular disease were randomly implanted with plate or loop haptic implants after uncomplicated phacoemulsification. The baseline position of the IOL was determined from a video frame acquired at the conclusion of surgery. Postoperative IOL position was documented using digital retroillumination images at 2 weeks and 6 months after surgery. Capsular fusion patterns were recorded using slit-lamp biomicroscopy. Correlation of IOL rotation with axial length, capsular contraction, and fusion was attempted.Main outcome measures Early IOL rotation, occurring between surgery and 2 weeks after surgery, was graded as mild (<10°), moderate (10°< to <30°), or severe (>30°) by a semiobjective online comparison of the images. Late IOL rotation, occurring between 2 weeks and 6 months, was measured more precisely using software developed specifically for the study.Results Twenty-three patients were allocated the loop haptic and 25 the plate haptic IOL. The groups were comparable for demographic variables and numbers of patients excluded from analysis (P > 0.05). Five (24%) of 21 of plate haptic IOLs underwent severe early rotation compared to 2 (9%) of 22 loop haptics (P = 0.36). The median late rotation was 6.8° for loop haptics compared to 0.6° for plate haptics (P = 0.0073). Between 2 weeks and 6 months, anticlockwise rotation had occurred in 16 (89%) of 18 loop haptic IOLs compared to 11 (52%) of 21 plate haptic IOLs (P = 0.0081).Conclusions Plate haptic IOLs show greater rotational stability than do loop haptics made from polypropylene once capsular fusion has taken place. Loop haptics invariably rotate anticlockwise after 2 weeks.</div></front></TEI></ISTEX></double></record>Pour manipuler ce document sous Unix (Dilib)
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