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Asharlous A, Hashemi H, Yekta A, Riazifar A, Doostdar A, Sadri M, Rakhshan A, Ostadimoghaddam H, Khabazkhoob M. The Effect of Cycloplegia on Ocular Alignment and AC/A Ratio. JOVR [Internet]. 2024Mar.10 [cited 2024Apr.28];19(1):82–87. Available from: https://knepublishing.com/index.php/JOVR/article/view/15442

https://doi.org/10.18502/jovr.v19i1.15442

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authors

  • Amir Asharlous

    Amir Asharlous

    Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
  • Hassan Hashemi

    Hassan Hashemi

    Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
  • Abbasali Yekta

    Abbasali Yekta

    Department of Optometry, Mashhad University of Medical Sciences, Mashhad, Iran
  • Alireza Riazifar

    Alireza Riazifar

    Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
    https://orcid.org/0000-0003-1707-2847
  • Asgar Doostdar

    Asgar Doostdar

    Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
  • Mahsa Sadri

    Mahsa Sadri

    Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran
  • Amir Rakhshan

    Amir Rakhshan

    Department of Foreign Languages, Tehran University of Medical Sciences, Tehran, Iran
  • Hadi Ostadimoghaddam

    Hadi Ostadimoghaddam

    Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
  • Mehdi Khabazkhoob

    Mehdi Khabazkhoob

    Department of Basic Sciences, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Published Date

  • Mar 10, 2024
This journal is publishing all the articles under Creative Commons Attribution License CC BY 4.0.

The Effect of Cycloplegia on Ocular Alignment and AC/A Ratio

Journal of Ophthalmic and Vision Research (JOVR) / Jan–Mar 2024, Volume 19, Issue 1 / Pages 82–87

Abstract

Purpose: The present study sets out to investigate the effect of cyclopentolate-induced cycloplegia on distance and near deviation and the accommodative convergence/accommodation (AC/A) ratio.


Methods: This prospective study was performed on 30 subjects. The inclusion criteria included a lack of any active ocular pathology and systemic diseases, no history of ocular surgery, and nonuse of various medications. Refraction, near and distance deviation were measured for all subjects, and the same examinations were repeated after the administration of two drops of cyclopentolate 1% to both eyes.


Results: The obtained data from 30 subjects, including 19 males, with a mean age of 22.53 ± 1.74 years were analyzed. The mean ± SD of near deviation in dry and cycloplegic conditions were – 6.9 ± 8.1 and +6.4 ± 9.1 prism diopters, respectively, which were statistically significant (P < 0.001). Distance deviation in cycloplegic conditions demonstrated an average difference of 0.8 prism diopters, compared to dry conditions (P < 0.001). AC/A ratios were 4.7 ± 2.5 and 9.7 ± 3.9 (Δ/D) in non-cycloplegic and cycloplegic conditions, respectively, which was a statistically significant difference (P < 0.001). The multiple regression indicated that among all under study variables, refraction (B coefficient: –2.4; P < 0.001) and near pre-cycloplegic deviation (B coefficient: 0.56; P < 0.001) were significantly associated with post-cycloplegic near deviation.


Conclusion: The results of this study indicated that cycloplegia causes a considerable esophoric shift in near deviation and a negligible esophoric shift in distance deviation. As a result, the AC/A ratio demonstrated a significant increase due to unequal changes in near and distance deviation.

Keywords:

Convergence, Mydriatics, Strabismus

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