Abstract
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.Theα 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 other-wise overlooked in retinal disease progression.
Original language | English (US) |
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Article number | 29 |
Pages (from-to) | 1-11 |
Number of pages | 11 |
Journal | Translational Vision Science and Technology |
Volume | 9 |
Issue number | 11 |
DOIs | |
State | Published - Oct 2020 |
Keywords
- Contrast sensitivity
- Retinal ischemia
- Visual adaptation
ASJC Scopus subject areas
- Biomedical Engineering
- Ophthalmology