scholarly journals Visual Function and Functional Vision of Retinitis Pigmentosa

2021 ◽  
Vol 20 (3) ◽  
pp. 99-104
Author(s):  
Hyeong Gon Yu ◽  
Chang Ki Yoon
Keyword(s):  
Clinical Trials ◽  
Visual Field ◽  
Retinitis Pigmentosa ◽  
Visual Impairment ◽  
Contrast Sensitivity ◽  
Color Vision ◽  
Visual Function ◽  
Functional Vision

Patients with retinitis pigmentosa have defects in visual function, including the visual field, color vision, contrast sensitivity, and impaired functional vision, such as reading and driving. An assessment of visual function is required when interpreting the outcome of clinical trials of retinitis pigmentosa. Various defects of functional vision should be considered when assessing visual impairment for patients with retinitis pigmentosa.

scholarly journals Visual Function Tests as cost Effective Screening Tools For Diabetic Retinopathy

2020 ◽  
Vol 36 (1) ◽  
Author(s):  
Faryal Ahmed ◽  
Faraz Iftikhar Malik ◽  
Chaudhary Ehtsham Azmat ◽  
Ambreen Gul ◽  
Ali Raza
Keyword(s):  
Visual Acuity ◽  
Diabetic Retinopathy ◽  
Contrast Sensitivity ◽  
Color Vision ◽  
Visual Function ◽  
Cost Effective ◽  
Screening Tools ◽  
Diabetic Patients ◽  
Effective Screening ◽  
Function Tests

Purpose:  To find out the importance of visual function tests as cost effective screening tools for diabetic retinopathy. Study Design:  Descriptive, Cross sectional study. Place and Duration of Study:  Ophthalmology Unit of Holy Family Hospital, from September 2018 to November 2018. Material and Methods:  Two hundred and forty-two patients were selected by convenience sampling technique and were divided into three groups. Two groups of diabetics with and without retinopathy and one group of non-diabetics age-matched controls. After relevant history, patients were examined for Visual acuity, Color vision and Contrast sensitivity using Snellen’s Chart, 24 Plates Ishihara Chart and Pelli Robson Chart respectively. Staging of retinopathy was done after mydriasis. Results:  Diabetic patients irrespective of type and stage, when compared with non-diabetic patients had a greater percentage of abnormal visual function tests. A 6/6 visual acuity was observed in 38.2% of non diabetics as compared to only 8.6% diabetics without retinopathy and 7.5% of diabetics with retinopathy. Color vision abnormalities were detected in only 8.6% of non diabetic patients. However, 11.1% of diabetics without retinopathy and 23.7% with retinopathy showed abnormalities of color vision. The percentage of abnormal Contrast sensitivity was 76.2% for diabetics with retinopathy and 60.4% for diabetics without retinopathy and 27.1% for non-diabetic patients. Conclusion:  Evaluation of Visual Acuity, Color Vision and Contrast Sensitivity are cheap and easy tests that can be used to screen for diabetic retinopathy thereby allowing early interventions to prevent development of serious ocular diabetic complications.

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

The Use of Acupuncture in Ophthalmology

1980 ◽  
Vol 08 (01n02) ◽  
pp. 104-153 ◽  
Author(s):  
Susan Wong ◽  
Renald Ching
Keyword(s):  
Visual Field ◽  
Retinitis Pigmentosa ◽  
Color Vision ◽  
High Myopia ◽  
Eye Diseases ◽  
Periodic Treatment ◽  
Healing Power ◽  
Scientific Terms ◽  
Per Se

The object of this study is to answer the question: Is acupuncture of any use in ophthalmology? Ophthalmology today can boast of 95% accuracy in diagnosis, but modern therapeutics has not caught up with diagnosis. Despite an inability to explain in modern scientific terms the healing power of acupuncture, documentation of over 500 cases treated shows that this modality can be successful in the treatment of eye diseases, especially in cases of retinitis pigmentosa, high myopia, cataracts, surgical aphakia, controlled glaucoma and re-attached ablation retinae. We notice in these cases that improvement occurs in the central acuity, and no improvement in the visual field, color-vision and nightblindness. Apparently acupuncture acts on the macula alone and not on the entire retina. Acupuncture is not intended to substitute for established medication or surgery in ophthalmology. It cannot restore a tissue or organ damaged beyond regeneration, "incurable" eye diseases per se are not cured by acupuncture. Only symptoms are relieved and dimness of vision is a symptom which can be alleviated in many cases with periodic treatment.

scholarly journals Visual impairment in children with a brain tumor: a prospective nationwide multicenter study using standard visual testing and optical coherence tomography (CCISS study)

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
M. A. Nuijts ◽  
M. H. Degeling ◽  
I. Stegeman ◽  
A. Y. N. Schouten-van Meeteren ◽  
S. M. Imhof
Keyword(s):  
Optical Coherence Tomography ◽  
Visual Acuity ◽  
Brain Tumor ◽  
Visual Field ◽  
Visual Impairment ◽  
Visual Function ◽  
Field Testing ◽  
Optical Coherence ◽  
Visual Field Testing

Abstract Background Children with a brain tumor have a high risk of impaired vision. Up to now, visual acuity measurement, visual field testing and orthoptic testing are the most informative diagnostic investigations for the assessment of visual function. Evaluating vision in children can be challenging given the challenges in cooperation, concentration and age-dependent shifts in visual tests. Since visual loss due to a brain tumor can be progressive and irreversible, we must aim to detect visual impairment as early as possible. Several studies have shown that optical coherence tomography facilitates discovery of nerve fiber damage caused by optic nerve glioma. Consequently, early detection of potential ocular damage will effect treatment decisions and will provide timely referral to visual rehabilitation centers. Methods/design The CCISS study is a prospective, observational, multicenter cohort study in The Netherlands. Patients aged 0–18 years with a newly diagnosed brain tumor are invited for inclusion in this study. Follow-up visits are planned at 6, 12, 18 and 24 months. Primary endpoints are visual acuity, visual field and optical coherence tomography parameters (retinal nerve fiber layer thickness and ganglion cell layer – inner plexiform layer thickness). Secondary endpoints include the course of visual function (measured by visual acuity, visual field and optical coherence tomography at different follow-up visits), course of the disease and types of treatment. Discussion The CCISS study will heighten the awareness of visual impairment in different types of brain tumors in children. This study will show whether optical coherence tomography leads to earlier detection of visual impairment compared to standard ophthalmological testing (i.e. visual acuity, visual field testing) in children with a brain tumor. Furthermore, the systematic approach of ophthalmological follow-up in this study will give us insight in the longitudinal relation between the course of visual function, course of the disease and types of treatment in children with a brain tumor. Trial registration The CCISS study is prospectively registered in the Netherlands Trial Register (NTR) since April 2019. Identifier: NL7697.

scholarly journals Evaluation of Contrast Sensitivity, Chromatic Vision, and Reading Ability in Patients with Primary Open Angle Glaucoma

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Maria P. Bambo ◽  
Blanca Ferrandez ◽  
Noemi Güerri ◽  
Isabel Fuertes ◽  
Beatriz Cameo ◽  
...  
Keyword(s):  
Visual Field ◽  
Contrast Sensitivity ◽  
Visual Function ◽  
Reading Ability ◽  
Early Stage ◽  
Open Angle Glaucoma ◽  
Visual Field Defects ◽  
Open Angle ◽  
Cross Sectional ◽  
Field Defects

Purpose. To compare contrast sensitivity, acquired color vision deficiency, and reading ability in patients with glaucoma at different stages of the disease and to establish correlations between visual field parameters and visual function scores.Methods. This prospective cross-sectional study included 121 glaucoma patients. Subjects with a diagnosis of chronic open angle glaucoma were recruited and classified according to Hodapp-Parrish-Anderson criteria. Patients with severe visual field defects were excluded because they were older, which could bias the interpretation of visual function tests. Contrast sensitivity was measured using the Pelli-Robson Chart and the CSV1000E test. Chromatic vision was evaluated using the Farnsworth-panel D15 and the L’Anthony D15 tests of Vision Color Recorder software. Reading ability was measured using Radner-Vissum test.Results. Contrast sensitivity (with photopic and mesopic luminance with glare) differed significantly between patients with early and moderate visual field defects (p<0.05). Reading ability scores and results of the chromatic vision tests did not differ significantly between the two groups. Significant and moderate Spearman correlations between visual field indexes and contrast sensitivity tests were detected.Conclusions. Contrast sensitivity was significantly worse in patients with moderate glaucoma compared to those with early-stage glaucoma. Evaluation of visual function in clinical practice provides important information to address a glaucoma patient’s vision complaints.

scholarly journals Evaluation of Visual Function Requirements for Public Jobs in Saudi Arabia

2021 ◽  
Vol 9 (B) ◽  
pp. 608-613
Author(s):  
Majid A. Moafa ◽  
Waleed Alghamdi ◽  
Mohammed Alluwimi ◽  
Sulaiman Aldakhil ◽  
Ismail Abuallut ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Saudi Arabia ◽  
Visual Field ◽  
Color Vision ◽  
Visual Function ◽  
Career Paths ◽  
Career Advancement ◽  
Career Progression ◽  
International Standards ◽  
Eye Care

BACKGROUND: Certain occupations and career paths require potential candidates who meet certain visual standards that allow them to apply or hold realistic possibilities for career advancement. AIM: This study aims to assess the visual function requirements for public jobs in Saudi Arabia and compare them with international standards. METHODS: Interview with eye care specialists in the fields of optometry and ophthalmology was conducted. This interview was consisted of seven pre-approved questions on current vision health requirements for eyesight-dependent careers. RESULTS: Interview responses revealed the existence of several visual requirements which were visual acuity, color vision, and visual field. These requirements are essential for various government jobs and functions, with examinations of applicants being necessary for acceptance of a vacancy or subsequent career progression. CONCLUSION: Many government positions of employment require predefined level visual standards which are not widely known. Defining what these standards are and making them publicly accessible will aid both future candidates in better planning their employment options and specialists in providing the required standards on request.

scholarly journals Cerebral trauma-induced dyschromatopsia in the left hemifield: case presentation

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yoko Mase ◽  
Yoshitsugu Matsui ◽  
Eriko Uchiyama ◽  
Hisashi Matsubara ◽  
Masahiko Sugimoto ◽  
...  
Keyword(s):  
Visual Field ◽  
Color Vision ◽  
Temporal Lobe ◽  
Fusiform Gyrus ◽  
Ganglion Cell Complex ◽  
Automated Perimetry ◽  
Subjective Symptoms ◽  
Anterior Temporal Lobe ◽  
Case Presentation ◽  
Cerebral Trauma

Abstract Background Acquired color anomalies caused by cerebral trauma are classified as either achromatopsias or dyschromatopsias (Zeki, Brain 113:1721–1777, 1990). The three main brain regions stimulated by color are V1, the lingual gyrus, which was designated as human V4 (hV4), and the fusiform gyrus, designated as V4α. (Zeki, Brain 113:1721–1777, 1990). An acquired cerebral color anomaly is often accompanied by visual field loss (hemi- and quadrantanopia), facial agnosia, prosopagnosia, visual agnosia, and anosognosia depending on the underlying pathology (Bartels and Zeki, Eur J Neurosci 12:172–193, 2000), (Meadows, Brain 97:615–632, 1974), (Pearman et al., Ann Neurol 5:253–261, 1979). The purpose of this study was to determine the characteristics of a patient who developed dyschromatopsia following a traumatic injury to her brain. Case presentation The patient was a 24-year-old woman who had a contusion to her right anterior temporal lobe. After the injury, she noticed color distortion and that blue objects appeared green in the left half of the visual field. Although conventional color vision tests did not detect any color vision abnormalities, short wavelength automated perimetry (SWAP) showed a decrease in sensitivity consistent with a left hemi-dyschromatopsia. Magnetic resonance imaging (MRI) detected abnormalities in the right fusiform gyrus, a part of the anterior temporal lobe. At follow-up 14 months later, subjective symptoms had disappeared, but the SWAP abnormalities persisted and a thinning of the sectorial ganglion cell complex (GCC) was detected. Conclusion The results indicate that although the subjective symptoms resolved early, a reduced sensitivity of SWAP remained and the optical coherence tomography (OCT) showed GCC thinning. We conclude that local abnormalities in the anterior section of fusiform gyrus can cause mild cerebral dyschromatopsia without other symptoms. These findings indicate that it is important to listen to the symptoms of the patient and perform appropriate tests including the SWAP and OCT at the early stage to objectively prove the presence of acquired cerebral color anomaly.

scholarly journals Association of ocular blood flow and contrast sensitivity in normal tension glaucoma

2021 ◽  
Author(s):  
David Kuerten ◽  
Matthias Fuest ◽  
Peter Walter ◽  
Babac Mazinani ◽  
Niklas Plange
Keyword(s):  
Blood Flow ◽  
Visual Field ◽  
Contrast Sensitivity ◽  
Visual Field Defect ◽  
Prospective Trial ◽  
Normal Tension Glaucoma ◽  
Ocular Blood Flow ◽  
Retinal Blood Flow ◽  
Control Group ◽  
Field Defect

Abstract Purpose To investigate the relationship of ocular blood flow (via arteriovenous passage time, AVP) and contrast sensitivity (CS) in healthy as well as normal tension glaucoma (NTG) subjects. Design Mono-center comparative prospective trial Methods Twenty-five NTG patients without medication and 25 healthy test participants were recruited. AVP as a measure of retinal blood flow was recorded via fluorescein angiography after CS measurement using digital image analysis. Association of AVP and CS at 4 spatial frequencies (3, 6, 12, and 18 cycles per degree, cpd) was explored with correlation analysis. Results Significant differences regarding AVP, visual field defect, intraocular pressure, and CS measurement were recorded in-between the control group and NTG patients. In NTG patients, AVP was significantly correlated to CS at all investigated cpd (3 cpd: r =  − 0.432, p< 0.03; 6 cpd: r =  − 0.629, p< 0.0005; 12 cpd: r =  − 0.535, p< 0.005; and 18 cpd: r =  − 0.58, p< 0.001), whereas no significant correlations were found in the control group. Visual acuity was significantly correlated to CS at 6, 12, and 18 cpd in NTG patients (r =  − 0.68, p< 0.002; r =  − 0.54, p< .02, and r =  − 0.88, p< 0.0001 respectively), however not in healthy control patients. Age, visual field defect MD, and PSD were not significantly correlated to CS in in the NTG group. MD and PSD were significantly correlated to CS at 3 cpd in healthy eyes (r = 0.55, p< 0.02; r =  − 0.47, p< 0.03). Conclusion Retinal blood flow alterations show a relationship with contrast sensitivity loss in NTG patients. This might reflect a disease-related link between retinal blood flow and visual function. This association was not recorded in healthy volunteers.

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