The difference between retinal nerve fiber layer thickness in both eyes of non-amblyopic anisometropia and its relationship with their stereopsis

Document Type : Original article

Authors

1 Students` Research Office, MSc in Optometrist, School of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences. Tehran, Iran

2 Professor in Ophthalmology, Faculty of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences Tehran, Iran.

3 Professor in Ophthalmology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences. Tehran, Iran

4 MSc in Biostatistics, School of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Abstract

Background and Aim: This Study was performed in order to determine the mean difference of retinal nerve fiber layer thickness in both eyes of non-amblyopic anisometropia and evaluation of its relationship with near stereopsis of these individuals.
Materials and Methods: In the present analytical descriptive study, 23 patients with non-amblyopic anisometropia were chosen (13 men, 10 women, with an average age of 27.82 and with the range age of 18-35 years). Patients were studied after applying the inclusion and exclusion criteria. The difference of nerve fiber layer thickness in both eyes of non-amblyopic anisometropia was determined and then its relationship with near stereopsis was evaluated.
Results: Anisometropic patients were divided into 3 groups: anisoastigmatism, anisomyopic, and anisohypropic. The difference of the means of the retinal nerve fiber layer thickness was found to be 0.08 between the right and the left eyes in anisometropic patients, which is not statistically significant (P= 0.979). The difference of the means in anisoastigmatic group was calulcated to be 0.72±5.21 and .83± 4.19 in non-anisoastigmatic group, which was not statistically significant, either (P= 0.436). The difference of the means in was 1.00±4.10 anisomyopic group and 1.10±5.30 in non-anisomyopic group, which waere not significant, either (P= 0.296). The data of the anisohypropic group was not stiatistically studied due to the insufficiency of participants (one individual only). The correlation coefficient between the thickness difference and stereopsis was found to be %19.6, reveling no statistically significant difference (P= 0.371).
Conclusion: There is no significant difference between the mean of thickness of retinal nerve fiber layers of right and left eyes in patients with non-amblyopic anisometropia. Also, there is no significant relationship between near stereopsis and the aforementioned thickness difference in these individuals.

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The Scientific Journal of Rehabilitation Medicine
Volume 4, Issue 4 - Serial Number 4
November and December 2015
Pages 107-115

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History

  • Receive Date: 05 May 2015
  • Revise Date: 21 June 2015
  • Accept Date: 14 October 2015
  • First Publish Date: 22 December 2015

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