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Overminus Lens Therapy for Children 3 to 10 Years of Age With Intermittent ExotropiaA Randomized Clinical Trial

Educational Objective
To evaluate the effectiveness of overminus spectacles to improve distance intermittent exotropia control.
1 Credit CME
Key Points

Question  Does overminus lens therapy improve distance control in children with intermittent exotropia?

Findings  This randomized clinical trial found that mean distance exotropia control was significantly better among 386 children aged 3 to 10 years treated with overminus spectacles vs nonoverminus spectacles for 12 months; however, after weaning off overminus spectacles, there was little or no difference in distance control between groups. Myopic shift was approximately one-third diopter greater in the overminus than in the nonoverminus group.

Meaning  Overminus lens therapy improved distance exotropia control in children 3 to 10 years of age but was associated with greater myopic shift, and the improved control did not persist after overminus treatment was discontinued.

Abstract

Importance  This is the first large-scale randomized clinical trial evaluating the effectiveness and safety of overminus spectacle therapy for treatment of intermittent exotropia (IXT).

Objective  To evaluate the effectiveness of overminus spectacles to improve distance IXT control.

Design, Setting, and Participants  This randomized clinical trial conducted at 56 clinical sites between January 2017 and January 2019 associated with the Pediatric Eye Disease Investigator Group enrolled 386 children aged 3 to 10 years with IXT, a mean distance control score of 2 or worse, and a refractive error between 1.00 and −6.00 diopters (D). Data analysis was performed from February to December 2020.

Interventions  Participants were randomly assigned to overminus spectacle therapy (−2.50 D for 12 months, then −1.25 D for 3 months, followed by nonoverminus spectacles for 3 months) or to nonoverminus spectacle use.

Main Outcomes and Measures  Primary and secondary outcomes were the mean distance IXT control scores of participants examined after 12 months of treatment (primary outcome) and at 18 months (3 months after treatment ended) assessed by an examiner masked to treatment group. Change in refractive error from baseline to 12 months was compared between groups. Analyses were performed using the intention-to-treat population.

Results  The mean (SD) age of 196 participants randomized to overminus therapy and 190 participants randomized to nonoverminus treatment was 6.3 (2.1) years, and 226 (59%) were female. Mean distance control at 12 months was better in participants treated with overminus spectacles than with nonoverminus spectacles (1.8 vs 2.8 points; adjusted difference, −0.8; 95% CI, −1.0 to −0.5; P < .001). At 18 months, there was little or no difference in mean distance control between overminus and nonoverminus groups (2.4 vs 2.7 points; adjusted difference, −0.2; 95% CI, −0.5 to 0.04; P = .09). Myopic shift from baseline to 12 months was greater in the overminus than the nonoverminus group (−0.42 D vs −0.04 D; adjusted difference, −0.37 D; 95% CI, −0.49 to −0.26 D; P < .001), with 33 of 189 children (17%) in the overminus group vs 2 of 169 (1%) in the nonoverminus group having a shift higher than 1.00 D.

Conclusions and Relevance  Children 3 to 10 years of age had improved distance exotropia control when assessed wearing overminus spectacles after 12 months of overminus treatment; however, this treatment was associated with increased myopic shift. The beneficial effect of overminus lens therapy on distance exotropia control was not maintained after treatment was tapered off for 3 months and children were examined 3 months later.

Trial Registration  ClinicalTrials.gov Identifier: NCT02807350

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Article Information

Accepted for Publication: January 12, 2021.

Published Online: March 4, 2021. doi:10.1001/jamaophthalmol.2021.0082

Corresponding Author: Angela M. Chen, OD, MS, Jaeb Center for Health Research, 15310 Amberly Dr, Ste 350, Tampa, FL 33647 (pedig@jaeb.org).

Author Contributions: Ms Hercinovic had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.

Concept and design: Chen, Erzurum, Chandler, Melia, Suh, Kong, Kraker, Holmes, Cotter.

Acquisition, analysis, or interpretation of data: Chen, Chandler, Hercinovic, Melia, Bhatt, Vricella, Erickson, Miller, Marsh, Bodack, Martinson, Titelbaum, Gray, Holtorf, Kong, Kraker, Rahmani, Shah, Holmes, Cotter.

Drafting of the manuscript: Chen, Erzurum, Chandler, Hercinovic, Titelbaum, Kraker.

Critical revision of the manuscript for important intellectual content: All authors.

Statistical analysis: Chandler, Hercinovic, Melia, Kraker, Holmes.

Obtained funding: Kraker, Holmes, Cotter.

Administrative, technical, or material support: Bhatt, Vricella, Miller, Gray, Kong, Kraker, Rahmani, Holmes, Cotter.

Supervision: Chen, Erzurum, Chandler, Melia, Suh, Miller, Marsh, Kraker, Holmes, Cotter.

Conflict of Interest Disclosures: None reported.

Funding/Support: Research reported in this publication was supported by grants EY011751, EY023198, EY018810, and EY024333 from the National Eye Institute of the National Institutes of Health.

Role of the Funder/Sponsor: The funder had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.

Members of the Pediatric Eye Disease Investigator Group (PEDIG):

Clinical Sites: Sites are listed in order by number of participants enrolled (in parentheses). Personnel are listed as (I) for Investigator, (C) for Coordinator, or (E) for Examiner.

Department of Ophthalmology, Texas Children’s Hospital, Houston, TX (22): Evelyn A. Paysse (I); Amit R. Bhatt (I); Kelsie B. Morrison (I); Irene T. Tung (I); Kimberly G. Yen (I); Gihan Romany (C). Children’s Hospital & Medical Center, Omaha, NE (22): Donny W. Suh (I); Whitney R. Brown (I); Rachel M. Smith (I); Carolyn Chamberlain (C); Samiksha Fouzdar Jain (E); Linda A. Morgan (E). Ticho Eye Associates, Chicago Ridge, IL (17): Benjamin H. Ticho (I); Megan Allen (I); Birva K. Shah (I); Deborah A. Clausius (C); Micaela N. Quebbemann (E). Virginia Pediatric Eye Center, Virginia Beach, VA (17): Eric Crouch (I); Earl R. Crouch, Jr (I); Stacy R. Martinson (I); Gaylord G. Ventura (C). Cincinnati Children’s Hospital, Cincinnati, OH (16): Michael E. Gray (I); Melissa L. Rice (I); Neil Vallabh (C); Shemeka Rochelle Forte (E); Miqua Lynn Stewart (E). Children's Mercy Hospitals and Clinics, Kansas City, MO (15): Amy L. Waters (I); Justin D. Marsh (I); Rebecca J. Dent (C); Adriana Marie Ferreira (E); Jennifer N. Qayum (E); Christina M. Twardowski (E). Greater Baltimore Medical Center, Baltimore, MD (14): Mary Louise Z. Collins (I); Allison A. Jensen (I); Maureen A. Flanagan (C); Saman Bhatti (E); Cheryl L. McCarus (E); Tiffany Talia Tolbert (E). Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL (14): Sudhi P. Kurup (I); Rebecca B. Mets-Halgrimson (I); Bahram Rahmani (I); Magdalena Stec (I); Janice B. Zeid (I); Hantamalala Ralay Ranaivo (C); Erika A. De Leon (E); Anthony Jeffrey Klauer (E); Vivian Tzanetakos (E); Laura McCoy Vrablec (E). College of Optometry, State University of New York, New York, NY (14): Marilyn Vricella (I); Monica Joao (C); Shelby Leach (E); Rochelle Mozlin (E); Daniella Rutner (E); Erica L. Schulman-Ellis (E). University Eye Center at Ketchum Health, Anaheim, CA (13): Susan A. Cotter (I); Angela M. Chen (I); Silvia Han (I); Catherine L. Heyman (I); Reena A. Patel (I); Dashaini V. Retnasothie (I); Sue M. Parker (C); Desireh Akhamzadeh (E); Kristine Huang (E). Houston Eye Associates, The Woodlands, TX (13): Aaron M. Miller (I); Jorie L. Jackson (C); Monsey L. Alexander (E); Angela C. Dillon (E). Boston Medical Center, Boston, MA (11): Stephen P. Christiansen (I); Kara C. LaMattina (I); Jenna R. Titelbaum (I); Marissa G. Fiorello (C); Merit Gorgy (C); Nina Tamashunas (C); Natalie Sadlak (C); Wanjiku G. Githere (C); Jiwoo Kim (C); Abigail R. Goldberg (C); Mary A. Tresvalles (C); Kelly M. Castle (E); Jennifer E. Lambert (E). Nemours Children’s Clinic, Jacksonville, FL (10): John W. Erickson (I); Amy Thrift (C); Charlotte Ann Louise Reaser (E). UPMC Children’s Eye Center of Children’s Hospital of Pittsburgh, Pittsburgh, PA (10): Ken K. Nischal (I); Craig A. Luchansky (I); Ellen B. Mitchell (I); Sara Otaibi (I); Matthew S. Pihlblad (I); Lauren M. Runkel (C); Kaajal Nanda (E); Katherine Sanchez (E); Christin L. Sylvester (E). Arkansas Children’s Hospital/University of Arkansas Medical Sciences, Little Rock, AR (9): Paul H. Phillips (I); Adriana Paula Grigorian (I); Hannah L. Holtorf (I); Beth Colon (C); Shawn L. Cupit (E). Southern College of Optometry, Memphis, TN (9): Marie I. Bodack (I); Randy C. Brafford (C); Alicia A. Groce (E); Marc B. Taub (E). Illinois College of Optometry (ICO), Chicago, IL (8): Yi Pang (I); Megan Allen (I); Huizi Yin (I); Elyse Nylin (C). Texas Tech University Health Science Center, Lubbock, TX (8): Lingkun Kong (I); Misty Rae Sisneros (C); Connie J. Crossnoe (E). Salus University/Pennsylvania College of Optometry, Philadelphia, PA (8): Erin C. Jenewein (I); Stanley W. Hatch (I); Jenny Myung (I); Ruth Y. Shoge (I); Karen E. Pollack (C); Mitchell M. Scheiman (E). UAB School of Optometry, Birmingham, Alabama (7): Tamara S. Oechslin (I); Marcela Frazier (I); Katherine K. Weise (I); Jenifer Montejo (C); Margaret Kathleen Bailey (E); Kristine B. Hopkins (E); Candice I. Turner (E). Concord Ophthalmologic Associates, Concord, NH (7): Christie L. Morse (I); Caroline C. Fang (E); Jacqueline Kathryn Gavin (E). Pediatric Ophthalmology, PC, Grand Rapids, Michigan (7): Patrick J. Droste (I); Robert J. Peters (I); Jan Hilbrands (C); Kylie L. Smith (E). Mayo Clinic, Rochester, MN (7): Erick D. Bothun (I); Brian G. Mohney (I); Tomohiko Yamada (I); Suzanne M. Wernimont (C); Adam M. Hauglid (E); Lindsay D. Klaehn (E); Andrea M. Kramer (E); Laura Lepor (E); Sarah R. Mickow (E). Department of Ophthalmology and Visual Sciences, University of Kentucky, Lexington, KY (6): Christi M. Willen (I); Julia L. Stevens (I); Yvonne R. James (C); Michele Reg (C); John Mark Franklin (E). CHU-Sainte-Justine, Montreal (6): Rosanne Superstein (I); Maryse Thibeault (C); Afifa Argoubi (E); Charlotte Riguidel (E); Alexandra Rodrigues (E). Dean A. McGee Eye Institute, University of Oklahoma, Oklahoma City, OK (6): R. Michael Siatkowski (I); Janine E. Collinge (I); Maria E. Lim (I); Tammy Yanovitch (I); Alisha N. Brewer (C); Laurie Parrott (E); Lauren M. Pendarvis (E). Stanford University, Palo Alto, CA (6): Scott R. Lambert (I); Deborah Alcorn (I); Euna B. Koo (I); Naz Jehangir (C); Kristina Liu (C); Tawna L. Roberts (E); Amanda M. Yonkers (E). Wilmer Institute, Baltimore, MD (5): Michael X. Repka (I); Courtney Kraus (I); Xiaonong Liu (C); Alex Christoff (E). Indiana University School of Optometry, Bloomington, IN (5): Don W. Lyon (I); Katie S. Connolly (I); Kristy M. Dunlap (C). Pediatric Eye Specialists, Chattanooga, TN (5): Rachel L. Brown (I); Edward A. Peterson (I). Duke University Eye Center, Durham, NC (5): Nathan L. Cheung (I); Sarah K. Jones (C); Sandra Holgado (E); Rachel N. Loud (E); Ivonne J. Rodriguez (E). Helen DeVos Children’s Hospital Pediatric Ophthalmology, Grand Rapids, MI (5): Brooke E. Geddie (I); Julie A. Conley (I); Elisabeth T. Wolinski (C); Sonia Manuchian (E); Katie L. Patterson (E); Samantha K. Rosen (E). Children’s Eye Care PC, West Bloomfield, MI (5): Lisa Bohra (I); Elena M. Gianfermi (I); Susan Nicole Perzyk (C); Stephen Michael Burwell (E); Mary Ann DeYoung-Smith (E); Lauren Marozas (E); Judy Lynn Petrunak (E); Martha Mary Wright (E). Wolfe Eye Clinic, West Des Moines, IA (5): Derek P. Bitner (I); Alexis C. Hahn (C); Lisa M. Fergus (E). University of Florida, Gainesville, FL (4): Swati Agarwal-Sinha (I); Casey J. Beal (I); Shannon Hampton (C); Kati M. Ostvig (E). Midwestern University Therapy Institute, Glendale, AZ (4): Alicia E. Feis (I); Caitlin C. Miller (I); Kelly D. Varney (I); Tracy A. Bland (C); Christina A. Esposito (E); Matthew K. Roe (E). Riley Hospital for Children, Indianapolis, IN (4): Kathryn M. Haider (I); Charline S. Boente (I); Heather A. Smith (I); Michele E. Whitaker (C). The Emory Eye Center, Atlanta, GA (3): Jason H. Peragallo (I); Amy K. Hutchinson (I); Phoebe D. Lenhart (I); Natalie C. Weil (I); Judy L. Brower (C); Alex Frederick Lyons (E); Shane P. Mulvihill (E); Marla J. Shainberg (E). St Luke’s Children’s Ophthalmology, Boise, ID (3): Katherine A. Lee (I); Laurie A. Cartwright (C); Kevin R. Gertsch (E). The Ohio State University, Columbus, OH (3): Marjean T. Kulp (I); Jennifer S. Fogt (I); Steven T. Manning (I); Ann M. Morrison (I); Maureen D. Plaumann (I); Erica Rose Shelton (I); Freda Dallas (C); Nancy E. Stevens (C); Michelle J. Buckland (E); Andrew J. Toole (E). Nova Southeastern University College of Optometry, The Eye Institute, Ft Lauderdale, FL (3): Cristina L. Law (I); Deborah M. Amster (I); Amar Sayani (I); Felicia Jean Timmermann (C); Michael J. Au (E); Katherine E. Green (E); Jacqueline Rodena (E); Yin C. Tea (E); Julie A. Tyler (E). University of Houston College of Optometry, Houston, TX (3): Ruth E. Manny (I); Heather A. Anderson (I); Debra C. Currie (I); Muriel M. Martinez (I). Eye Care Associates, Inc, Poland, OH (3): S. Ayse Erzurum (I); Alysa Christiansen (C); Zainab Dinani (E). Western University College of Optometry, Pomona, CA (3): Ida Chung (I); Kimberly R. Walker (I); Jennifer Baker (C); Elaine C. Ramos (E). Akron Children’s Hospital, Akron, OH (2): Casandra S. Solis (I); Ana Juric (C); Isabel Ricker (C); Tawna Roberts (E); Palak B. Wall (E). The Eye Specialist Center, LLC, Munster, IN (2): Birva K. Shah (I); Benjamin H. Ticho (E). UCSF Department of Ophthalmology, San Francisco, CA (2): Alejandra de Alba Campomanes (I); Yizhuo Bastea-Forte (C); Laura Kate Chalkley (E); Karen Cooper (E). Pediatric Eye Associates, Wilmette, IL (2): Lisa C. Verderber (I); Deborah R. Fishman (I); Roberta A. Forde (C). Tufts Medical Center, Boston, MA (1): Catherine S. Choi (I); Sara Galinko (C); Shelley J. Klein (E). Alberta Children's Hospital, Calgary (1): William F. Astle (I); Emi Nicole Sanders (C); Catriona I. Kerr (E); Heather N. Sandusky (E); Shannon L. Steeves (E). Medical University of South Carolina, Storm Eye Institute, Charleston, SC (1): Edward W. Cheeseman (I); Mae M. Peterseim (I); Carol U. Bradham (C). Gundersen Health System, La Crosse, WI (1): David L. Nash (I); Sara R. Meyers (C); Fabiana Berns (E). Loma Linda University Eye Institute, Loma Linda, CA (1): Timothy W. Winter (I); Marcia M. Easterly (C); Rosalynn Nguyen-Strongin (E). University of Minnesota–Minnesota Lions Children’s Eye Clinic, Minneapolis, MN (1): Sara J. Downes (I); Sasha Strul (I); Ann M. Holleschau (C); Laura M. May (E); Kim S. Merrill (E); Anna I. Schweigert (E). OHSU Casey Eye Institute, Portland, OR (1): Allison I. Summers (I); Paula K. Rauch (C); Grant Andrew Casey (E); Kevin M. Woodruff (E). Pacific University College of Optometry, Portland, OR (1): Paula A. Luke (I); Richard London (I); Jayne L. Silver (C); Ryan C. Bulson (E); James J. Kundart (E).

PEDIG Coordinating Center–Tampa, FL: Raymond T. Kraker, Roy W. Beck, Gillaine Alvarez, Darrell S. Austin, Nicole M. Boyle, Danielle L. Chandler, Patricia L. Connelly, Courtney L. Conner, Trevano W. Dean, Quayleen Donahue, Brooke P. Fimbel, Robert J. Henderson, Amra Hercinovic, James E. Hoepner, Joseph D. Kaplon, Zhuokai Li, B. Michele Melia, Julianne L. Robinson, Jennifer A. Shah, David O. Toro, Rui Wu.

Intermittent Exotropia Study 5 Planning Committee: Angela M. Chen (Co-Chair), S. Ayse Erzurum (Co-Chair), Jonathan M. Holmes, Danielle L. Chandler, David A. Leske, Raymond T. Kraker, Roy W. Beck, Eileen E. Birch, Michael X. Repka, David K. Wallace, Allison A. Jensen, Reena A. Patel, B. Michele Melia, Courtney L. Conner.

PEDIG Executive Committee: Susan A. Cotter (Co-chair), Jonathan M. Holmes (Co-chair), Roy W. Beck, Eileen E. Birch, Angela M. Chen (2017-18), Stephen P. Christiansen (2018-present), Laura B. Enyedi (2014-16), S. Ayse Erzurum (2016-present), Donald F. Everett, Sharon F. Freedman (2016-18), William V. Good (2017-19), Raymond T. Kraker, Katherine A. Lee (2014-16), Richard London (2018-present), Vivian M. Manh (2016-18), Ruth E. Manny (2017-19), David G. Morrison (2018-19), Stacy L. Pineles (2019-present), Hantamalala Ralay Ranaivo (2019-present), Michael X. Repka, Scott T. Ruark (2018-19), Bonita R. Schweinler (2016-18), Jayne L. Silver (2014-16), Allison I. Summers (2019-present), Lisa C. Verderber (2015-17), David K. Wallace, Katherine K. Weise (2019-present).

Strabismus Steering Committee: Amit Bhatt (2019-present), Eileen E. Birch, Danielle L. Chandler, Angela M. Chen (2016-present), Patricia Cobb (2019), Susan A. Cotter, Eric R. Crouch (2015-18), Trevano W. Dean (2015-18), Sean P. Donahue (2010-present), S. Ayse Erzurum (2016-present), Michael E. Gray (2017), Kammi B. Gunton (2016-17), Sarah R. Hatt, Jonathan M. Holmes, Erin C. Jenewein (2018), Raymond T. Kraker, Courtney Kraus (2018), Sudhi P. Kurup (2019), Elizabeth L. Lazar (2014-18), Zhuokai Li (2020-present), Justin D. Marsh (2018-19), Michele Melia, David G. Morrison (2018-present), Yi Pang (2017-18), Sue M. Parker (2017-18), Reena Patel (2016-17), Michael X. Repka, Dashaini V. Retnasothie (2019), Tawna L. Roberts (2017), Allyson Sala (2016-17), Elyse Nylin (2019-present), Allison I. Summers (2018-present), Marilyn Vricella (2019-present), Tomohiko Yamada (2015-16).

National Eye Institute: Donald F. Everett.

Data and Safety Monitoring Committee: Marie Diener-West (chair), John D. Baker, Barry Davis, Dale L. Phelps, Stephen W. Poff, Richard A. Saunders, Lawrence Tychsen.

Meeting Presentation: This paper was presented at the Annual Meeting of the American Academy of Optometry; October 7, 2020; virtual meeting; and the Annual Meeting of the Association for Pediatric Ophthalmology and Strabismus; April 13, 2021; virtual meeting.

Data Sharing Statement: See Supplement 3.

References
1.
Hatt  SR , Gnanaraj  L .  Interventions for intermittent exotropia.   Cochrane Database Syst Rev. 2013;(5):CD003737.PubMedGoogle Scholar
2.
Romano  PE , Wilson  MF . Survey of current management of intermittent exotropia in the USA and Canada. In: Campos  EC , ed.  Strabismus and Ocular Motility Disorders. Macmillan Press; 1990:391-396. doi:10.1007/978-1-349-11188-6_55
3.
Donaldson  PJ , Kemp  EG .  An initial study of the treatment of intermittent exotropia by minus overcorrection.   Br Orthopt J. 1991;48:41-43.Google Scholar
4.
Reynolds  JD , Wackerhagen  M , Olitsky  SE .  Overminus lens therapy for intermittent exotropia.   Am Orthopt J. 1994;44:86-91. doi:10.1080/0065955X.1994.11982018 Google ScholarCrossref
5.
Caltrider  N , Jampolsky  A .  Overcorrecting minus lens therapy for treatment of intermittent exotropia.   Ophthalmology. 1983;90(10):1160-1165. doi:10.1016/S0161-6420(83)34412-2 PubMedGoogle ScholarCrossref
6.
Rowe  FJ , Noonan  CP , Freeman  G , DeBell  J .  Intervention for intermittent distance exotropia with overcorrecting minus lenses.   Eye (Lond). 2009;23(2):320-325. doi:10.1038/sj.eye.6703057 PubMedGoogle ScholarCrossref
7.
Goodacre  H.   Minus overcorrection: conservative treatment of intermittent exotropia in the young child—a comparative study.   Aust Orthopt J. 1985;22:9-17.Google Scholar
8.
Kennedy  JR .  The correction of divergent strabisums with concave lenses.   Am J Optom Arch Am Acad Optom. 1954;31(12):605-614. doi:10.1097/00006324-195412000-00001 PubMedGoogle ScholarCrossref
9.
Watts  P , Tippings  E , Al-Madfai  H .  Intermittent exotropia, overcorrecting minus lenses, and the Newcastle scoring system.   J AAPOS. 2005;9(5):460-464. doi:10.1016/j.jaapos.2005.04.010 PubMedGoogle ScholarCrossref
10.
Bayramlar  H , Gurturk  AY , Sari  U , Karadag  R .  Overcorrecting minus lens therapy in patients with intermittent exotropia: should it be the first therapeutic choice?   Int Ophthalmol. 2017;37(2):385-390. doi:10.1007/s10792-016-0273-9 PubMedGoogle ScholarCrossref
11.
Chen  AM , Holmes  JM , Chandler  DL ,  et al; Pediatric Eye Disease Investigator Group.  A randomized trial evaluating short-term effectiveness of overminus lenses in children 3 to 6 years of age with intermittent exotropia.   Ophthalmology. 2016;123(10):2127-2136. doi:10.1016/j.ophtha.2016.06.042 PubMedGoogle ScholarCrossref
12.
World Medical Association.  World Medical Association Declaration of Helsinki: ethical principles for medical research involving human subjects.   JAMA. 2013;310(20):2191-2194. doi:10.1001/jama.2013.281053PubMedGoogle ScholarCrossref
13.
A randomized clinical trial of overminus spectacle therapy for intermittent exotropia. ClinicalTrials.gov identifier: NCT02807350. Updated December 10, 2020. Accessed September 11, 2020. https://clinicaltrials.gov/ct2/show/NCT02807350
14.
Mohney  BG , Holmes  JM .  An office-based scale for assessing control in intermittent exotropia.   Strabismus. 2006;14(3):147-150. doi:10.1080/09273970600894716 PubMedGoogle ScholarCrossref
15.
Hatt  SR , Liebermann  L , Leske  DA , Mohney  BG , Holmes  JM .  Improved assessment of control in intermittent exotropia using multiple measures.   Am J Ophthalmol. 2011;152(5):872-876. doi:10.1016/j.ajo.2011.05.007 PubMedGoogle ScholarCrossref
16.
Hatt  SR , Mohney  BG , Leske  DA , Holmes  JM .  Variability of control in intermittent exotropia.   Ophthalmology. 2008;115(2):371-376. doi:10.1016/j.ophtha.2007.03.084 PubMedGoogle ScholarCrossref
17.
Hatt  SR , Leske  DA , Liebermann  L , Holmes  JM .  Quantifying variability in the measurement of control in intermittent exotropia.   J AAPOS. 2015;19(1):33-37. doi:10.1016/j.jaapos.2014.10.017 PubMedGoogle ScholarCrossref
18.
Hatt  SR , Leske  DA , Liebermann  L , Holmes  JM .  Symptoms in children with intermittent exotropia and their impact on health-related quality of life.   Strabismus. 2016;24(4):139-145. doi:10.1080/09273972.2016.1242640 PubMedGoogle ScholarCrossref
19.
Hatt  SR , Leske  DA , Yamada  T , Bradley  EA , Cole  SR , Holmes  JM .  Development and initial validation of quality-of-life questionnaires for intermittent exotropia.   Ophthalmology. 2010;117(1):163-168.e1. doi:10.1016/j.ophtha.2009.06.038 PubMedGoogle ScholarCrossref
20.
Leske  DA , Holmes  JM , Melia  BM ; Pediatric Eye Disease Investigator Group.  Evaluation of the Intermittent Exotropia Questionnaire using Rasch analysis.   JAMA Ophthalmol. 2015;133(4):461-465. doi:10.1001/jamaophthalmol.2014.5622 PubMedGoogle ScholarCrossref
21.
Little  RJA , Rubin  DB . The model-based approach to nonresponse: multiple imputation. In:  Statistical Analysis With Missing Data. 1st ed. Wiley; 1987:255-259.
22.
Farrington  CP , Manning  G .  Test statistics and sample size formulae for comparative binomial trials with null hypothesis of non-zero risk difference or non-unity relative risk.   Stat Med. 1990;9(12):1447-1454. doi:10.1002/sim.4780091208 PubMedGoogle ScholarCrossref
23.
Benjamini  Y , Hochberg  Y .  Controlling the false discovery rate: a practical and powerful approach to multiple testing.   J R Statist Soc B. 1995;57(1):289-300. doi:10.1111/j.2517-6161.1995.tb02031.x Google Scholar
24.
Iacobucci  IL , Martonyi  EJ , Giles  CL .  Results of overminus lens therapy on postoperative exodeviations.   J Ophthalmic Nurs Technol. 1987;6(1):19-24.PubMedGoogle Scholar
25.
de Paula  JS , Ibrahim  FM , Martins  MC , Bicas  HE , Velasco e Cruz  AA .  Refractive error changes in children with intermittent exotropia under overminus lens therapy.   Arq Bras Oftalmol. 2009;72(6):751-754. doi:10.1590/S0004-27492009000600002 PubMedGoogle ScholarCrossref
26.
Rutstein  RP , Marsh-Tootle  W , London  R .  Changes in refractive error for exotropes treated with overminus lenses.   Optom Vis Sci. 1989;66(8):487-491. doi:10.1097/00006324-198908000-00001 PubMedGoogle ScholarCrossref
27.
Kushner  BJ .  Does overcorrecting minus lens therapy for intermittent exotropia cause myopia?   Arch Ophthalmol. 1999;117(5):638-642. doi:10.1001/archopht.117.5.638 PubMedGoogle ScholarCrossref
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