Color Vision and Contrast Sensitivity Testing after Radial Keratotomy

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.

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Contrast Sensitivity and Color Vision as Biomarkers of the Preclinical Stage of Neurodegeneration in Huntington’s Disease

Sovremennye tehnologii v medicine ◽

10.17691/stm2019.11.2.11 ◽

2019 ◽

Vol 11 (2) ◽

pp. 77

Author(s):

S.N. Svetozarskiy

Keyword(s):

Huntington's Disease ◽

Huntington’S Disease ◽

Contrast Sensitivity ◽

Color Vision ◽

Preclinical Stage

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Reproducibility of morphoscopic contrast sensitivity testing with the Visual Capacity Analyzer

Journal of Cataract & Refractive Surgery ◽

10.1016/s0886-3350(03)00044-0 ◽

2003 ◽

Vol 29 (9) ◽

pp. 1776-1779 ◽

Cited By ~ 3

Author(s):

Hyung Kuen Lee ◽

Il Hwan Koh ◽

Chul Myong Choe ◽

Chan Yoon Kim ◽

Young Jae Hong ◽

...

Keyword(s):

Contrast Sensitivity ◽

Sensitivity Testing

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The effect of amblyopia on contrast sensitivity, color vision, and stereoacuity

Al-Basar International Journal of Ophthalmology ◽

10.4103/bijo.bijo_5_17 ◽

2017 ◽

Vol 4 (2) ◽

pp. 54

Author(s):

IslamAltrifi Musa Suliman ◽

MadihaSid Ahmed Ali

Keyword(s):

Contrast Sensitivity ◽

Color Vision

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Contrast Sensitivity Testing in Retinal Vein Occlusion Using a Novel Stimulus

Translational Vision Science & Technology ◽

10.1167/tvst.9.11.29 ◽

2020 ◽

Vol 9 (11) ◽

pp. 29

Author(s):

Shubhendu Mishra ◽

Nenita Maganti ◽

Natalie Squires ◽

Prithvi Bomdica ◽

Divya Nigam ◽

...

Keyword(s):

Contrast Sensitivity ◽

Retinal Vein Occlusion ◽

Sensitivity Testing ◽

Vein Occlusion

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Association of Photopic and Mesopic Contrast Sensitivity in older drivers with risk of motor vehicle collision using naturalistic driving data

BMC Ophthalmology ◽

10.1186/s12886-020-1331-7 ◽

2020 ◽

Vol 20 (1) ◽

Author(s):

Cynthia Owsley ◽

Thomas Swain ◽

Rong Liu ◽

Gerald McGwin ◽

Mi Young Kwon

Keyword(s):

Older Adults ◽

Contrast Sensitivity ◽

Motor Vehicle ◽

Age Groups ◽

Time Of Day ◽

Motor Vehicle Crash ◽

Older Drivers ◽

Crash Risk ◽

Sensitivity Testing ◽

Naturalistic Driving

Abstract Background Older drivers have a crash rate nearly equal to that of young drivers whose crash rate is the highest among all age groups. Contrast sensitivity impairment is common in older adults. The purpose of this study is to examine whether parameters from the photopic and mesopic contrast sensitivity functions (CSF) are associated with incident motor vehicle crash involvement by older drivers. Methods This study utilized data from older drivers (ages ≥60 years) who participated in the Strategic Highway Research Program Naturalistic Driving Study, a prospective, population-based study. At baseline participants underwent photopic and mesopic contrast sensitivity testing for targets from 1.5–18 cycles per degree. Model fitting generated area under the log CSF (AULCSF) and peak log sensitivity. Participant vehicles were instrumented with sensors that captured continuous driving data when the vehicle was operating (accelerometers, global positioning system, forward radar, 4-channel video). They participated for 1–2 years. Crashes were coded from the video and other data streams by trained analysts. Results The photopic analysis was based on 844 drivers, and the mesopic on 854 drivers. Photopic AULCSF and peak log contrast sensitivity were not associated with crash rate, whether defined as all crashes or at-fault crashes only (all p > 0.05). Mesopic AULCSF and peak log sensitivity were associated with an increased crash rate when considered for all crashes (rate ratio (RR): 1.36, 95% CI: 1.06–1.72; RR: 1.28, 95% CI: 1.01–1.63, respectively) and at-fault crashes only (RR: 1.50, 95% CI: 1.16–1.93; RR: 1.38, 95% CI: 1.07–1.78, respectively). Conclusions Results suggest that photopic contrast sensitivity testing may not help us understand future crash risk at the older-driver population level. Results highlight a previously unappreciated association between older adults’ mesopic contrast sensitivity deficits and crash involvement regardless of the time of day. Given the wide variability of light levels encountered in both day and night driving, mesopic vision tests, with their reliance on both cone and rod vision, may be a more comprehensive assessment of the visual system’s ability to process the roadway environment.

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

Nepalese Journal of Ophthalmology ◽

10.3126/nepjoph.v11i2.27816 ◽

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.

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