Contrast Sensitivity and Color Vision in Eyes With Retinitis Pigmentosa and Good Visual Acuity: Correlations With SD-OCT Findings

2012 ◽  
Vol 43 (6) ◽  
pp. S44-S53 ◽  
Author(s):  
Georgia G. Yioti ◽  
Chris D. Kalogeropoulos ◽  
Miltiadis B. Aspiotis ◽  
Maria I. Stefaniotou
Keyword(s):  
Visual Acuity ◽  
Retinitis Pigmentosa ◽  
Contrast Sensitivity ◽  
Color Vision ◽  
Good Visual Acuity ◽  
Sd Oct

scholarly journals Visual Acuity, Contrast Sensitivity and Color Vision Three Years After Iodine-125 Brachytherapy for Choroidal and Ciliary Body Melanoma

2015 ◽  
Vol 9 (1) ◽  
pp. 131-135 ◽  
Author(s):  
Irena Tsui ◽  
Robert M Beardsley ◽  
Tara A McCannel ◽  
Scott C Oliver ◽  
Melissa W Chun ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Color Vision ◽  
Ciliary Body ◽  
Case Series ◽  
Vision Measurement ◽  
Corrected Visual Acuity ◽  
Iodine 125 ◽  
Decrease In Visual Acuity ◽  
Ciliary Body Melanoma

Purpose : To report visual acuity, contrast sensitivity and color vision prior to, 1 year after, 2 years after and 3 years after iodine-125 brachytherapy for choroidal and ciliary body melanoma (CCM). Design : Prospective interventional case series. Participants : Thirty-seven patients (37 eyes) with CCM. Methods : Patients had best-corrected Early Treatment Diabetic Retinopathy Study (ETDRS) visual acuity, Pelli-Robson contrast sensitivity and Hardy-Rand-Rittler color vision measurement; comprehensive ophthalmology examination; optical coherence tomography; and ultrasonography at baseline prior to, 1 year after, 2 years after and 3 years after I-125 brachytherapy. Main Outcome Measures : Visual acuity, contrast sensitivity and color vision prior to, 1 year after, 2 years after and 3 years after brachytherapy. Results : Nineteen (19) men and 18 women with mean age of 58 years (SD 13, range 30-78) prior to, 1 year after, 2 years after and 3 years after brachytherapy had mean best-corrected visual acuity of 77 letters (20/32), 65 letters (20/50), 56 letters (20/80) and 47 letters (20/125); contrast sensitivity of 30, 26, 22 and 19 letters; color vision of 26, 20, 17 and 14 test figures, respectively. Decrease in visual acuity, contrast sensitivity and color vision was statistically significant from baseline at 1 year, 2 years, and 3 years after brachytherapy. Decreased acuity at 3 years was associated with mid-choroid and macula melanoma location, ≥ 4.1 mm melanoma height, radiation maculopathy and radiation optic neuropathy. Conclusion : 1, 2 and 3 years after brachytherapy, eyes with CCM had significantly decreased visual acuity, contrast sensitivity and color vision.

scholarly journals A Clinical Study of Optic Disc Edema in a Tertiary Eye Center of Nepal

2019 ◽  
Vol 11 (2) ◽  
pp. 122-129
Author(s):  
Anil Parajuli ◽  
Ananda Kumar Sharma ◽  
Sanjeeta Sitaula
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Color Vision ◽  
Optic Disc ◽  
Blind Spot ◽  
Optic Disc Edema ◽  
Disc Edema ◽  
Vision Defect ◽  
Common Causes ◽  
Life Threatening

Purpose: To evaluate the etiology and clinical presentation of cases with optic disc edema presenting to a tertiary eye center of Nepal. Background: The etiology of optic disc edema ranges from relatively benign to potentially sight and life threatening conditions. Till date very few studies have been done on disc edema in Nepal. Method: The authors conducted a prospective, descriptive study at B.P. Koirala Lions Center for Ophthalmic Studies (BPKLCOS), Nepal. All cases with disc edema presenting to the out patient department (OPD) from January 1, 2014 to June 30, 2015 were included in the study. Results: Total 112 patients were included in the study, out of which diagnosis could be established in 99. The mean age of the patients was 32.54 ± 13.97 years with the majority being female. The most common cause of disc edema was idiopathic intracranial hypertension (IIH) (37.5%,). Majority of the patients complained of isolated diminution of vision (38.4%). Among the eyes affected, 78.3% had best corrected visual acuity (BCVA) 6/6-6/18, 36.6% had color vision defect and 31.4% had reduced contrast sensitivity. The most common visual field defect was isolated enlarged blind spot (39.7 %). Conclusion: IIH followed by optic neuritis (ON) are the most common causes of disc edema. Conditions with disc edema mainly affect the age group 21-40 years with females affected 2.5 times more than males. Visual acuity, color vision and contrast sensitivity are deranged in majority of cases of ON and normal in majority of cases of IIH.

scholarly journals Contrast visual acuity in patients with retinitis pigmentosa assessed by a contrast sensitivity tester

2012 ◽  
Vol 60 (6) ◽  
pp. 545 ◽  
Author(s):  
Atsushi Otani ◽  
Nagahisa Yoshimura ◽  
Masanori Hangai ◽  
Hajime Nakamura ◽  
Maho Oishi ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Retinitis Pigmentosa ◽  
Contrast Sensitivity

scholarly journals Visual acuity vs letter contrast sensitivity in retinitis pigmentosa

1995 ◽  
Vol 35 (10) ◽  
pp. 1495-1499 ◽  
Author(s):  
Kenneth R. Alexander ◽  
Deborah J. Derlacki ◽  
Gerald A. Fishman
Keyword(s):  
Visual Acuity ◽  
Retinitis Pigmentosa ◽  
Contrast Sensitivity

scholarly journals The Impact of Cataract Surgery on Contrast Visual Acuity and Retinal Sensitivity in Patients with Retinitis Pigmentosa

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Gen Miura ◽  
Takayuki Baba ◽  
Tomoaki Tatsumi ◽  
Hirotaka Yokouchi ◽  
Shuichi Yamamoto
Keyword(s):  
Visual Acuity ◽  
Retinitis Pigmentosa ◽  
Cataract Surgery ◽  
Contrast Sensitivity ◽  
Retinal Sensitivity ◽  
Zone Length ◽  
Ellipsoid Zone ◽  
Postoperative Visual Acuity ◽  
Before And After ◽  
The Impact

Purpose. To determine the effects of cataract surgery on contrast visual acuity and retinal sensitivity in patients with retinitis pigmentosa. Methods. Retinal sensitivity and contrast visual acuity were determined by microperimetry (MAIA) and contrast sensitivity acuity tester (CAT-CP), respectively, before and after cataract surgery. The significance of the correlations between visual acuity, retinal sensitivity, contrast visual acuity, improvements after surgery, and macular structure before and after cataract surgery was determined. Results. Retinal sensitivity and contrast visual acuity were significantly improved after cataract surgery. The correlations among postoperative visual acuity, postoperative retinal sensitivities, and preoperative ellipsoid zone length were significant. The postoperative retinal sensitivity of the central 10° and the ellipsoid zone length was particularly significantly correlated. Preoperative contrast visual acuity and the amount of improvement and preoperative retinal sensitivity and the amount of improvement were significantly negatively correlated. The contrast visual acuity under both the 100% and 10% photopic and mesopic conditions improved significantly after cataract surgery. Conclusions. Cataract surgery in retinitis pigmentosa patients with preserved ellipsoid zones significantly improved retinal sensitivity and contrast visual acuity. Cataract surgery can be expected to improve retinal sensitivity and contrast visual acuity under various conditions, even if preoperative visual parameters are low, as long as the ellipsoid zone is preserved.

Effects of blunt trauma of eye on retinal nerve fibre layer

2021 ◽  
Vol 2 (4) ◽  
pp. 228-232
Author(s):  
Kumar Aalok ◽  
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Blunt Trauma ◽  
Color Vision ◽  
Control Groups ◽  
Rnfl Thickness ◽  
Department Of Ophthalmology ◽  
Significant Difference ◽  
And Control

AIM: To study the effects of blunt trauma of eye on visual acuity and retinal nerve fiber layer (RNFL). METHODS: A prospective observational study was done on the patients of a road traffic accident (RTA) having blunt trauma injury of the eye from august 2018 to July 2019 at the Department of Ophthalmology, Hind Institute of Medical Sciences, Barabanki. Patients between the age group of 20 to 65 years undergoing RTA with ocular complaints were included in this study. Colour vision, contrast sensitivity, and best-corrected visual acuity (BCVA) were recorded, RNFL analysis was done through OCT. RESULTS: A total of 108 patients were enrolled in this study and were grouped as 54 cases and 54 controls. The mean age was 43±2.3 years with 11 (20.37%) females and 43 (79.6%) males in the case group. At initial visit after RTA, the difference between color vision, contrast sensitivity and BCVA between right and left eyes of cases and controls were significant. After a follow up of 3mo only significant difference was noted in contrast sensitivity between cases and control groups. Change in color vision and BCVA after 3mo was insignificant. Similarly, an initial significant difference was noted in mean RNFL thickness between cases and control groups, but after follow up of 3mo mean RNFL thickness difference was significant only in superior and temporal quadrants. CONCLUSION: RTA or blunt trauma of eye can lead to persistent RNFL thinning and decreased visual function.

Color vision is strongly associated with retinal thinning in multiple sclerosis

2012 ◽  
Vol 18 (7) ◽  
pp. 991-999 ◽  
Author(s):  
Pablo Villoslada ◽  
Ami Cuneo ◽  
Jeffrey Gelfand ◽  
Stephen L Hauser ◽  
Ari Green
Keyword(s):  
Multiple Sclerosis ◽  
Visual Acuity ◽  
Color Vision ◽  
Color Discrimination ◽  
Visual Pathway ◽  
Visual Disability ◽  
Fiber Layer ◽  
Cross Sectional ◽  
Low Contrast ◽  
Sd Oct

Objectives: Multiple Sclerosis (MS) frequently causes injury to the anterior visual pathway (AVP), impairing quality of life due to visual dysfunction. Development of biomarkers in MS is a high priority and both low-contrast visual acuity (LCVA) and time-domain optical coherence tomography (TD-OCT) have been proposed as candidates for this purpose. We sought to assess whether psychophysical assessments of color vision are similarly correlated with structural measures of AVP injury, and therefore augment measures of visual disability in MS. Methods: We studied the association between high-contrast visual acuity (HCVA), LCVA, color vision (Hardy–Rand–Rittler plates (HRR) and Lanthony D15 tests) and OCT, using both high-resolution spectral-domain OCT (SD-OCT; Spectralis, Heidelberg Engineering, Germany) and TD-OCT (Stratus, Carl Zeiss, US) in a cohort of 213 MS patients (52 with previous optic neuritis) and 47 matched controls in a cross-sectional study. Results: We found that MS patients have impairments in HCVA and LCVA ( p < 0.001) but that they suffer from even more profound abnormalities in color discrimination ( p < 0.0001). We found strong correlation between color vision and SD-OCT measures of retinal nerve fiber layer (RNFL) thickness (average RNFL, r = 0.594, p < 0.001) and papillomacular bundle thickness ( r = −0.565, p < 0.001). The correlation between OCT scores and functional visual impairments of all types was much stronger for SD-OCT than for TD-OCT. Conclusion: Our results indicate that color vision is highly correlated with these OCT scores when compared with traditional measures of visual acuity. Also we found that SD-OCT is superior to TD-OCT for detecting anterior visual pathway damage in MS. This makes both color-visual measures and SD-OCT strong candidate biomarkers of disease progression.

scholarly journals Effects of Intermediate-Tinted Lenses on Pistol Marksmanship and Visual Performance

2020 ◽  
Author(s):  
Hong Gao ◽  
Jay E Clasing ◽  
Robert N Kang ◽  
Micah J Kinney
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Color Vision ◽  
Sensitivity Function ◽  
Contrast Sensitivity Function ◽  
Light Transmittance ◽  
Viable Option ◽  
Bonferroni Adjustment ◽  
Post Hoc ◽  
Combat Environment

ABSTRACT Introduction The standard issue clear or sun Military Combat Eye Protection (MCEP) is often inadequate in visually challenging training or combat environment. Intermediate-tinted lenses may offer a viable option for warfighters operating in dynamic visual conditions such as moving rapidly from bright sunny areas to darker building interiors in combat. Because the use of intermediate-tinted lenses has been delayed as a result of a potential negative impact on vision performance such as color perception, this investigation evaluated several commercially available intermediate-tinted lenses for operation performance during a U.S. military field training. Test lenses complied with all the requirements of the current MCEP except for the visible light transmittance (VLT) values that ranged between 32 and 62%. Materials and Methods Study subjects consisted of 22 service members who attended a military Close Combat and Marksmanship training course in May 2019. Visual and pistol marksmanship performance of three intermediate-tinted lenses (Eye Safety Systems [ESS] Copper [32% VLT], Oakley Prizm TR45 [44% VLT], and ESS Bronze [62% VLT]) was compared to that of a standard issue MCEP, ESS Clear (90% VLT). Quick contrast sensitivity function test was used to assess quality vision (AULCSF, area under a log contrast sensitivity function) and visual acuity (CSF Acuity). Color vision was assessed by Cone Contrast Test. Pistol marksmanship (Bill Drill) was used for performance testing. A pre-survey inquired about MCEP use, and a MCEP survey during the pistol marksmanship testing inquired about lens performance and ranking. Results AULCSF and CSF Acuity were significantly affected by the lenses (general linear model, repeated measures, P &lt; .05). Bonferroni post hoc test showed a significant reduction of binocular AULCSF from ESS Clear to Oakley Prizm TR45 (P = .003) and ESS Copper (P &lt; .001) and a significant reduction in binocular CSF Acuity from ESS Clear to ESS Copper (P = .001). Color vision and pistol marksmanship performance were not significantly affected by wearing different lenses (P &gt; .05). Subjectively, there were no statistically significant differences among study lenses in perceived “clarity of vision,” “ability to clearly identify the target,” or “overall performance” (Friedman test and Wilcoxon signed-rank post hoc test with Bonferroni adjustment, P &gt; .017). Participants ranked Prizm TR45 (44% VLT) and ESS Bronze (62% VLT) lenses significantly more favorably than EES Clear (P = .001 and P = .009). Conclusions Quality of vision and visual acuity decreased with darker lenses; however, the study lenses had insignificant impacts on pistol marksmanship and subjective acceptance. Our surveys indicated that Intermediate-tinted lenses were operationally acceptable and preferred over a standard issue MCEP. While more evaluations for color vision deficient subjects are needed, overall results suggest that commercially available intermediate-tinted lenses may be a viable option to enhance protection and performance in a visually dynamic combat environment.

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