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Study of Eye Convergence

Montecalvo, Natalie R
http://rave.ohiolink.edu/etdc/view?acc_num=osu1565966301837973

Abstract Details

2019, Master of Science, Ohio State University, Vision Science.
Purpose: Convergence Insufficiency (CI) is a common binocular vision disorder that frequently results in symptoms with near work. The purpose of this study was to evaluate the proportion of subjects who could voluntarily converge with and without a target. A second purpose of this study was to determine the sensitivity and specificity of the inability to voluntarily converge for detection of convergence insufficiency and other binocular vision disorders. An additional objective was to compare mean values for NPC, PFV in adults to the limited normative data in the current literature. Methods: Subjects ages 8 years and older with 20/32 or better visual acuity were recruited from visitors at the Center of Science and Industry in Columbus, Ohio. Testing involved administration of the Convergence Insufficiency Symptom Survey (CISS) and evaluation of phoria (Modified Thorington), near point of convergence, positive and negative fusional vergences, accommodative amplitude, visual acuity, and dry autorefraction. Results: Sixty-five participants were enrolled (mean age = 22.3 ± 15.5). Among all participants assessed in this study, 85% were able to voluntarily converge with a target held at 6 cm, while only 55% were able to voluntarily converge their eyes without a target. The majority of participants without signs of CI, AI or significant esophoria were able to converge either voluntarily (75%) or with a target at 6cm (90%). On the other hand, the majority of participants with 2-3 signs of CI were unable to converge voluntarily (38%), but 71% could converge to a target at 6cm. The inability to converge to a target at 6cm was associated with identifying a patient with a 3 sign CI with sensitivity of 0.67 and specificity of 0.89. Conclusion: Inability to converge either voluntarily or to a target at 6cm was associated with signs of CI. Inability to converge to a target identified 2/3 of those with 3 signs of CI.
Marjean Kulp, O.D., M.S. (Advisor)
Nicklaus Fogt, O.D., PhD (Committee Member)
Andrew Toole, O.D. (Committee Member)
52 p.
Ophthalmology
convergence insufficiency, accommodation, near point of convergence, proximal vergence, voluntary vergence

Recommended Citations

Citations

  • Montecalvo, N. R. (2019). Study of Eye Convergence [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1565966301837973

    APA Style (7th edition)

  • Montecalvo, Natalie. Study of Eye Convergence. 2019. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1565966301837973.

    MLA Style (8th edition)

  • Montecalvo, Natalie. "Study of Eye Convergence." Master's thesis, Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1565966301837973

    Chicago Manual of Style (17th edition)

osu1565966301837973
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This open access ETD is published by The Ohio State University and OhioLINK.