Visual Acuity and Color Vision Deficiency in Amblyopia

2018

OAJO

Purpose: Aim of the present study is to compare contrast sensitivity in different types of ocular deviation for different amount of deviation.Methods: A pilot, cross sectional, observational study was performed at tertiary eye care centers. Subjects with Ocular deviation between 10 to 40 prism diopters, Corrected distance Visual Acuity should be greater than 6/18 and Age should be between 10 to 40 years of age were included in the study. Contrast sensitivity was assessed with Pelli Robson Chart.Results: 30 subjects were included in the study. Out of that, 16 subjects were in the age group of 11-20 years, 12 subjects were in the age group of 21-30 years and 2 subjects were in the age group of 31-40 years. 60% subjects were Female and 40% subjects were Male. The mean contrast sensitivity was considered in each type and amount of deviation. It shows that maximum contrast sensitivity is deteriorated in Esotropia and in the ocular deviation of 31-40 prism diopters. Conclusions:This concludes that with increase in ocular deviation, there is a deterioration of Contrast Sensitivity.Maximum Contrast Sensitivity is deteriorated in Esotropia which is followed by Exotropia, Alternate Esotropia and Alternate Exotropia.

Section: Discussionmentioning

confidence: 99%

Comparison of Contrast Sensitivity in Different Types of Ocular Deviation for Different Amount of Deviation

2018

OAJO

“…That's why; at the temporal region cone cell density is reduced compared to foveal region. So, in case of Alternate Exodeviation, deterioration of visual acuity is being observed [4][5][6][7].…”

Section: Discussionmentioning

confidence: 99%

Comparison of Visual Acuity for Different Amount of Deviation of Alternate Exotropia

2018

OAJO

Methods: A pilot, cross sectional, observational study was performed at tertiary eye care centers. Subjects with Ocular deviation between 10 to 40 prism diopters, Corrected distance Visual Acuity should be greater than 6/18 and Age should be between 10 to 40 years of age were included in the study. Visual Acuity was assessed with Log Mar chart.Results: 30 subjects were included in the study. Out of that, 16 subjects were in the age group of 11-20 years, 12 subjects were in the age group of 21-30 years and 2 subjects were in the age group of 31-40 years. 60% subjects were Female and 40% subjects were Male. The mean visual acuity was considered in each amount of deviation. It shows that maximum acuity is deteriorated in the ocular deviation of 31-40 prism diopters. Conclusions:As the amount of ocular deviation increases, visual acuity will be more deteriorated.

“…With increase in ocular deviation, contrast sensitivity is simultaneously deteriorated. So, in cases of Alternate deviation like Eso deviation, alternately images are focused at the nasal para foveal region and deteriorate the contrast sensitivity [4][5][6][7].…”

Section: Discussionmentioning

confidence: 99%

Comparison of Contrast Sensitivity for Different Amount of Deviation of Alternate Esotropia

2018

OAJO

Purpose: Aim of the present study is to compare contrast sensitivity in different amounts of deviation of alternate exotropia Methods: A pilot, cross sectional, observational study was performed at tertiary eye care centers. Subjects with Ocular deviation between 10 to 40 prism diopters, Corrected distance Visual Acuity should be greater than 6/18 and Age should be between 10 to 40 years of age were included in the study. Contrast sensitivity was assessed with Pelli Robson Chart. Results: 30 subjects were included in the study. Out of that, 16 subjects were in the age group of 11-20 years, 12 subjects were in the age group of 21-30 years and 2 subjects were in the age group of 31-40 years. 60% subjects were Female and 40% subjects were Male. The mean contrast sensitivity was considered in each amount of deviation. It shows that maximum contrast is deteriorated in the ocular deviation of 31-40 prism diopters. Conclusions: As the amount of ocular deviation increases, contrast sensitivity will be more deteriorated.