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Related Concept Videos

Fixation and Sectioning01:03

Fixation and Sectioning

Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens.
The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...

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Related Experiment Video

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A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
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Published on: April 11, 2025

Fixation stability during Rarebit Fovea Test.

Maria M Nilsson1, Scott B Stevenson, Girish Kumar

  • 1Unit of Optometry, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden. Maria.Nilsson@ste.ki.se

Clinical & Experimental Optometry
|July 19, 2008
PubMed
Summary

Fixation stability during the Rarebit Fovea Test (RFT) was evaluated using eye tracking. The RFT

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A Method to Quantify Visual Information Processing in Children Using Eye Tracking
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A Method to Quantify Visual Information Processing in Children Using Eye Tracking

Published on: July 9, 2016

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Last Updated: Jul 3, 2026

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
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A Method to Quantify Visual Information Processing in Children Using Eye Tracking
09:47

A Method to Quantify Visual Information Processing in Children Using Eye Tracking

Published on: July 9, 2016

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Visual Science

Background:

  • Unstable fixation is a known issue affecting perimetry test reliability.
  • The Rarebit Fovea Test (RFT) assesses central visual field function with small stimuli and a dynamic fixation target.
  • The RFT omits traditional fixation control to minimize test duration.

Purpose of the Study:

  • To assess fixation stability during Rarebit Fovea Test (RFT) examinations.
  • To evaluate the efficacy of the RFT's dynamic fixation target in maintaining stable fixation.
  • To correlate fixation stability with RFT results.

Main Methods:

  • Twelve healthy and two amblyopic subjects participated.
  • A 3D eye tracker continuously recorded eye movements.
  • Two test sessions were conducted per subject: one with stimulus presentation and one without.

Main Results:

  • Mean hit rate (MHR) across all subjects was 89.7%.
  • Five subjects exhibited abnormal RFT results.
  • No significant differences in fixation stability were found between sessions with/without stimuli or between subjects with normal/abnormal MHR.

Conclusions:

  • The RFT design, including its fixation target, appears adequate for maintaining fixation stability.
  • This adequacy is particularly noted in subjects with normal or near-normal visual function.
  • Further research is required to understand the impact of various visual abnormalities on RFT fixation stability.