研究目的
To investigate a novel approach for structure-function modeling in glaucoma to improve visual field testing in the macula.
研究成果
Structural information from macular OCT can be incorporated into visual field testing using a novel Bayesian strategy, reducing testing time and improving accuracy, especially in unreliable responders. This approach is beneficial for detecting glaucoma progression in the macula.
研究不足
The structural estimates suffer from a floor effect, leading to upward bias at low thresholds. The model does not account for atrophic changes in external retina. Fixation instability and gradient effects in structural damage may affect accuracy.
1:Experimental Design and Method Selection:
The study used a structure-function model based on binary responses to stimuli, incorporating structural data from OCT scans to inform a Bayesian ZEST strategy. Methods included logistic modeling and simulations to compare standard and structural strategies.
2:Sample Selection and Data Sources:
Data from 20 healthy eyes and 31 eyes with central glaucomatous damage were collected from clinics in Milan and Bergamo, Italy. An independent dataset of 20 glaucoma patients was used for validation.
3:List of Experimental Equipment and Materials:
SD-OCT device (Spectralis; Heidelberg Engineering), fundus perimeter (Compass; CenterVue), MATLAB software, R software, Open Perimetry Interface package.
4:Experimental Procedures and Operational Workflow:
OCT scans were acquired and processed to estimate ganglion cell density. Perimetry was performed with fundus tracking. Images were matched using projective transformation. Binary responses were modeled, and simulations were conducted to evaluate strategy performance.
5:Data Analysis Methods:
Statistical analysis included mixed models in R, calculation of mean absolute error, number of presentations, and error limits. Simulations used methods from Henson et al. for response generation.
独家科研数据包,助您复现前沿成果,加速创新突破
获取完整内容