Related Experiment Video
Updated: Jan 12, 2026
07:12
Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
Published on: April 11, 2025
856
The Preferred Retinal Locus for Reading in Central Vision Loss
Arda Fidanci1, Colin S Flowers1, Christian Larson2
1Department of Psychology, University of Minnesota, Minneapolis, MN, United States.
Investigative Ophthalmology & Visual Science
|November 6, 2025
Summary
Most people with central vision loss (CVL) use their preferred retinal locus (PRL) for fixation during reading. Their reading PRL is typically close to their fixation PRL, aiding their visual task.
Area of Science:
- Ophthalmology
- Neuroscience
- Vision Science
Background:
- Central vision loss (CVL) often leads individuals to develop a preferred retinal locus (PRL) for fixation.
- The utilization of this fixational PRL (fPRL) during reading is not well understood.
Purpose of the Study:
- To investigate whether the PRL used for reading aligns with the fPRL in individuals with CVL.
- To compare the reading PRL with the fPRL in both normally sighted individuals and those with CVL.
Main Methods:
- Participants read text on a screen, with reading interrupted by screen blanking.
- The word participants were reading at the moment of interruption was recorded and its location compared to the fPRL measured by an eye tracker.
- The method was validated using normally sighted controls and then applied to 20 participants with CVL.
Main Results:
- Normally sighted controls correctly identified the word at or near the fovea (fPRL) in 77.03% of trials.
- Participants with CVL identified the word at or near their fPRL in 70.45% of trials.
- Most participants with CVL used a reading PRL close to their fPRL, with only one participant showing a distinct reading PRL.
Conclusions:
- The majority of individuals with CVL in this study utilized a reading PRL situated near their fPRL.
- This suggests that the fPRL plays a significant role in guiding reading behavior for many individuals with central vision loss.
More Related Videos
Related Concept Videos
01:20Anatomy of the Eyeball
9.4K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
9.4K
01:22Photoreceptors and Visual Pathways
8.7K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
8.7K
01:32The Retina
74.1K
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
74.1K
01:24Vision
59.3K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
59.3K