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Evaluation of fixation stability using different targets with the MP1 microperimeter
M Cesareo1, D Manca2, E Ciuffoletti2
1Ophthalmology Unit, Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Via Montpellier 1, 00133, Rome, Italy. massimo.cesareo@uniroma2.it.
International Ophthalmology
|April 12, 2014
Summary
This study found central fixation targets provide more stable fixation than pericentral targets when using the Nidek MP1 microperimeter. This is crucial for accurately evaluating changes in visual fixation.
Area of Science:
- Ophthalmology
- Visual Science
Background:
- Fixation stability is critical for accurate visual function assessment.
- The Nidek MP1 microperimeter is a tool used to measure fixation.
- Different fixation targets may influence stability measurements.
Purpose of the Study:
- To compare fixation stability using central (red cross) versus pericentral (red circle) targets with the Nidek MP1 microperimeter.
- To determine which fixation target offers superior stability in healthy subjects.
Main Methods:
- Twenty-nine healthy subjects underwent fixation testing using the Nidek MP1 microperimeter.
- Fixation stability was assessed using bivariate contour ellipse area (BCEA) calculations for central and pericentral targets.
- Statistical analysis included paired Student's t test and Chi squared test.
Main Results:
- Fixation stability was significantly less stable with the pericentral (red circle) target compared to the central (red cross) target (p < 0.001).
- Mean logBCEA and ellipse axis values differed significantly between the two targets.
- The central fixation target demonstrated superior stability.
Conclusions:
- Central fixation targets are advantageous for achieving more stable fixation measurements with the Nidek MP1 microperimeter.
- These findings are important for clinical evaluations requiring precise fixation assessment.
- Using central targets may improve the reliability of microperimetry results.
