Contrast Sensitivity Testing in Retinal Vein Occlusion Using a Novel Stimulus
| Autor: | Nenita Maganti, Natalie Squires, Shubhendu Mishra, Manjot K. Gill, Alice T. Lyon, Divya Nigam, Prithvi R. Bomdica, Arthur G. Shapiro, Rukhsana G. Mirza |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Study groups medicine.medical_specialty Retinal Vein genetic structures Biomedical Engineering Visual Acuity Stimulus (physiology) Retina Article visual adaptation Contrast Sensitivity 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Illusory motion Ophthalmology hemic and lymphatic diseases Occlusion Retinal Vein Occlusion Medicine Humans business.industry Vision Tests Disease progression retinal ischemia Retinal eye diseases 030104 developmental biology chemistry Sensitivity testing 030221 ophthalmology & optometry business |
| Zdroj: | Translational Vision Science & Technology |
| ISSN: | 2164-2591 |
| Popis: | Purpose This study evaluated a novel tool known as the motion diamond stimulus (MDS), which utilizes contrast-generated illusory motion in dynamic test regions to determine contrast sensitivity (CS). Methods Patients with treated unilateral retinal vein occlusions (RVOs) underwent three assessments: the MDS, the Pelli-Robson (PR), and the National Eye Institute's Visual Function Questionnaire (VFQ-25). The MDS assessment produced two data end points, α and β. The α value represents the overall contrast threshold level and the β value serves to quantify the adaptability of the visual contrast system. The CS parameters from the MDS and log CS PR output values were used to compare RVO eyes (n = 20) to control eyes (n = 20). Results The study participants had a mean composite VFQ-25 score of 89.5 ± 10.4 on the VFQ-25. A significant difference was observed between the RVO eyes and the control eyes in PR log CS scores (P value = 0.0001) and in MDS α value (P value = 0.01). No difference in MDS β value was found between the study groups (P value = 0.39). Conclusions The results for the MDS assessment's α parameter corroborated the PR scores, suggesting contrast sensitivity threshold impairment in patients with RVO. No significant difference in β value was observed, suggesting that adaptability of the visual system is maintained in treated RVO eyes. Translational Relevance Currently, visual complaints cannot be entirely identified by Snellen visual acuity alone. The MDS offers potentially a more complete look at visual function, by including contrast sensitivity and may be able to quantify changes otherwise overlooked in retinal disease progression. |
| Databáze: | OpenAIRE |
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