June 2022
Volume 63, Issue 7
Open Access
ARVO Annual Meeting Abstract  |   June 2022
Contrast sensitivity comparison of high myopic vs emmetropic patients using the Rabin Cone Contrast Sensitivity Test
Author Affiliations & Notes
  • Julián García-Sánchez
    Retina, Asociacion para Evitar la Ceguera IAP Hospital Dr Luis Sanchez Bulnes, Mexico City, Mexico City, Mexico
    Medicine, Universidad Anahuac Mexico, Huixquilucan, Mexico, Mexico
  • Luis Antonio Rhoads Avila
    Retina, Asociacion para Evitar la Ceguera IAP Hospital Dr Luis Sanchez Bulnes, Mexico City, Mexico City, Mexico
    Medicine, Universidad La Salle, Mexico City, Mexico City, Mexico
  • Rodrigo Garcia-Santisteban
    Retina, Asociacion para Evitar la Ceguera IAP Hospital Dr Luis Sanchez Bulnes, Mexico City, Mexico City, Mexico
    Retina, Universidad Panamericana, Ciudad de Mexico, Ciudad de México, Mexico
  • Sergio Peña-Aguilar
    Retina, Asociacion para Evitar la Ceguera IAP Hospital Dr Luis Sanchez Bulnes, Mexico City, Mexico City, Mexico
  • Juan Carlos Leyva-Velarde
    Retina, Asociacion para Evitar la Ceguera IAP Hospital Dr Luis Sanchez Bulnes, Mexico City, Mexico City, Mexico
  • Gustavo del Castillo Marquez
    Retina, Asociacion para Evitar la Ceguera IAP Hospital Dr Luis Sanchez Bulnes, Mexico City, Mexico City, Mexico
  • Jessica Serrano-Aguilar
    Retina, Asociacion para Evitar la Ceguera IAP Hospital Dr Luis Sanchez Bulnes, Mexico City, Mexico City, Mexico
  • Guillermo Salcedo-Villanueva
    Retina, Asociacion para Evitar la Ceguera IAP Hospital Dr Luis Sanchez Bulnes, Mexico City, Mexico City, Mexico
  • Footnotes
    Commercial Relationships   Julián García-Sánchez None; Luis Antonio Rhoads Avila None; Rodrigo Garcia-Santisteban None; Sergio Peña-Aguilar None; Juan Carlos Leyva-Velarde None; Gustavo del Castillo Marquez None; Jessica Serrano-Aguilar None; Guillermo Salcedo-Villanueva None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science June 2022, Vol.63, 4326 – A0031. doi:
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      Julián García-Sánchez, Luis Antonio Rhoads Avila, Rodrigo Garcia-Santisteban, Sergio Peña-Aguilar, Juan Carlos Leyva-Velarde, Gustavo del Castillo Marquez, Jessica Serrano-Aguilar, Guillermo Salcedo-Villanueva; Contrast sensitivity comparison of high myopic vs emmetropic patients using the Rabin Cone Contrast Sensitivity Test. Invest. Ophthalmol. Vis. Sci. 2022;63(7):4326 – A0031.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose :

High myopes experience lower contrast sensitivity (CS). A fast and easy way to test for CS has been developed by the RCCST; however, baseline CS measurements using this system in patients with high myopia remain unknown. This study tested the hypothesis that CS will be lower in high myopic patients compared to emmetropic individuals.

Methods : Cross-sectional, comparative study. Twenty-five patients with high myopia (less than or equal to 6 D and/or >26.5mm axial length) aging between 18 and 50 years with a BCVA equal or better than 20/40 were enrolled. Postoperative patients or with any ophthalmological disease associated with myopia were excluded. RCCST, and A-mode ultrasound measurement of the axial length were performed in all participants. RCCST results were expressed in logarithmic units. Obtained data was later compared with our previous CS reports of emmetropic individuals. Mann-Whitney U test and Spearman's correlation were used for statistical analysis.

Results :

Twenty-five patients were included in group A (high myopic), of which 14 were women and 11 were men. This group had a mean age of 26.6 years, standard deviation (SD): 5.46, range: 18 - 36 (95% CI: 24.34 - 28.85) . The mean CS was 1.56, SD: 0.21, range: 0.90 - 1.75 (95% CI: 1.47 - 1.64).
Group B (emmetropic patients) was composed of 76 patients, with a mean age of 25.78 years, SD 4.69, range 18 - 39 years. Mean CS for group B was 1.62, 0.09 SD, 95% CI 1.60 - 1.65 (range: 1.25 - 1.98).
A comparison of mean CS using Mann-Whitney U Test, resulted in a non-significant Z-score of -0.422 (P= 0.673). Spearman’s correlation between age and CS was performed for group A, resulting in a small, negative correlation, without statistical significance (Correlation Coefficient: -0.211; P= 0.311).
Group A presented a mean axial length of 27.11 mm, SD: 1.43, range: 25.41 - 31.01 (95% CI: 26.51 - 27.70). Spearman’s test between contrast sensitivity and axial length resulted in a small, negative, non-significant correlation (correlation coefficient: -0.053; P= 0.801).

Conclusions : Our results are consistent with our hypothesis, CS in high myopic patients appear to be lower than in emmetropic patients, however the difference was not statistically significant. There is a small negative correlation between axial length and CS suggesting that high axial lengths may present lower CS.

This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.

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