Related Experiment Video
Updated: May 15, 2026
07:12
A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
Published on: April 11, 2025
Fixation stability and scotoma mapping for patients with low vision
Ann E Elsner1, Benno L Petrig, Joel A Papay
1Indiana University School of Optometry, Bloomington, Indiana 47405, USA. aeelsner@indiana.edu
Summary
A new laser scanning digital camera (LSDC) simplifies fundus perimetry for fixation mapping and kinetic perimetry. This device accurately assesses fixation stability and reduces data variability in patients with various retinal conditions.
Area of Science:
- Ophthalmology
- Medical Imaging
- Visual Neuroscience
Background:
- Fundus perimetry is crucial for assessing visual field defects.
- Existing methods can be complex and prone to variability.
- A simplified, accurate device is needed for clinical practice.
Purpose of the Study:
- To develop a simplified device for fundus perimetry.
- To enable techniques like fixation mapping and kinetic perimetry.
- To improve the accuracy and efficiency of visual field testing.
Main Methods:
- Visual stimulation was integrated into a near-infrared retinal imager, the laser scanning digital camera (LSDC).
- The device uses slit scanning illumination and a 2D CMOS detector for continuous retinal viewing.
- Automatic alignment of retinal images enabled fixation mapping and stability quantification.
Main Results:
- Fixation mapping was successfully performed in patients with central scotoma and amblyopia.
- Automatic alignment quantified fixation stability in macular pathologies without causing scotoma.
- Fundus imaging reduced perimetric data variability by identifying eye motion artifacts.
Conclusions:
- Fundus perimetry using the LSDC is a versatile tool.
- The device facilitates a broad spectrum of fixation and perimetry tasks.
- This simplified approach enhances the clinical utility of fundus perimetry.
