29 May 2008
Fixation pattern in healthy subjects during microperimetry with the scanning laser ophthalmoscope
Fredrik P. KallmarkABCDEF, Jan YggeDEMed Sci Monit 2008; 14(6): CR311-315 :: ID: 859034
Abstract
Background
Visual field (VF) examinations provide important information about diagnosis and follow-up in many ocular and visual pathway disorders. Previous studies have shown that fixation stability can be measured very exactly around the center of the fixation point with SLO. The importance of measuring fixation during microperimetry in the absence of field defects is to learn more about the normal fixation pattern. This is of interest since changes in fixation pattern due to pathology can occur prior to detectable changes in the macula or visual pathway.
Material and Method
Thirty-one adult subjects with healthy eyes were recruited from the staff of the Section of Ophthalmology and Vision, Department of Clinical Neuroscience, Karolinska Institutet. The fixation pattern in one randomly selected eye from each subject was investigated with the SLO using the fixation control function in the microperimetry technique.
Results
The results showed that the fixation pattern had a mean center of gravity located at a mean absolute distance of 0.27 degrees from the fixation point (FP) and a directional predominance of the fixation pattern was found in that the fixations were more frequently distributed vertically than horizontally.
Conclusions
The computerized fixation control when performing microperimetry with the SLO provides information about the fixation pattern which cannot be obtained with standard clinical perimetry techniques.
Keywords: Ophthalmoscopes, Lasers, Health, Fundus Oculi, Visual Field Tests - methods, Fixation, Ocular - physiology
Editorial
01 March 2024 : Editorial
Editorial: First Regulatory Approvals for CRISPR-Cas9 Therapeutic Gene Editing for Sickle Cell Disease and Transfusion-Dependent β-ThalassemiaDOI: 10.12659/MSM.944204
Med Sci Monit 2024; 30:e944204
In Press
18 Mar 2024 : Clinical Research
Sexual Dysfunction in Women After Tibial Fracture: A Retrospective Comparative StudyMed Sci Monit In Press; DOI: 10.12659/MSM.944136
21 Feb 2024 : Clinical Research
Potential Value of HSP90α in Prognosis of Triple-Negative Breast CancerMed Sci Monit In Press; DOI: 10.12659/MSM.943049
22 Feb 2024 : Review article
Differentiation of Native Vertebral Osteomyelitis: A Comprehensive Review of Imaging Techniques and Future ...Med Sci Monit In Press; DOI: 10.12659/MSM.943168
23 Feb 2024 : Clinical Research
A Study of 60 Patients with Low Back Pain to Compare Outcomes Following Magnetotherapy, Ultrasound, Laser, ...Med Sci Monit In Press; DOI: 10.12659/MSM.943732
Most Viewed Current Articles
16 May 2023 : Clinical Research
Electrophysiological Testing for an Auditory Processing Disorder and Reading Performance in 54 School Stude...DOI :10.12659/MSM.940387
Med Sci Monit 2023; 29:e940387
17 Jan 2024 : Review article
Vaccination Guidelines for Pregnant Women: Addressing COVID-19 and the Omicron VariantDOI :10.12659/MSM.942799
Med Sci Monit 2024; 30:e942799
14 Dec 2022 : Clinical Research
Prevalence and Variability of Allergen-Specific Immunoglobulin E in Patients with Elevated Tryptase LevelsDOI :10.12659/MSM.937990
Med Sci Monit 2022; 28:e937990
01 Jan 2022 : Editorial
Editorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...DOI :10.12659/MSM.935952
Med Sci Monit 2022; 28:e935952